Feature:
I have owned this keyboard for 5 years and I still have not been able to figure out all of the features. The user interface to get things done is very difficult-- you have to press certain combinations of keys but there is no display to tell you that you're doing it correctly. The sustain pedal that I got with it is great-- very nice quality.

Quality:
I have had an issue with a key sticking for the past year. Also I had to replace the power supply after about a year of use. The power supply was somewhat difficult and required splicing a new power supply onto my old chord because the right sized input for the keyboard is hard to find. This keyboard has taken some abuse, though, and keeps on going so I can't really complain too much.

Value:
I got this on clearance so I got this at a great price for what it is. I have not regretted my purchase.

Desirability:
I love the color-- it is purple which is awesome. How many purple keyboards are out there? Not many. It is very streamlined, sleek, and nice looking. It feels great to play and was the main reason I bought it. I am looking to upgrade this instrument but I am too attached to it to get rid of it just yet.

Sound:
This keyboard has the classic Kurzweil sound which I used to be more fond of, but now the sound of the keyboard in the mid-range sounds a bit too synthesized for my taste. I don't use many of the sound options, I usually stick with the sustain piano. I wish it had a better organ sound! I use this at my church for worship and it definitely does the job. I get lots of compliments on the sound.

Ease of Use:
Very clearly marked for where to plug in what. The interface, as I stated under features, is difficult because the display only tells you what sound setting you're using. If you want a stage piano-- something you can plug into an amp or sound system and use as a piano, then this is a great buy.

Support:
It is difficult to find replacement parts for this keyboard (such as a power supply) since you have to find an authorized dealer and a lot of music stores are phasing out Kurzweil.

Overall:
I have kept this for 5 years and have been very happy with it. I would love to upgrade but in order to get anything better I have to spend quite a large sum of money. This is not just a beginner instrument-- it gets you through to an intermediate and I would say advanced intermediate and meets all your needs. The only thing is now I have started paying attention to the actual sound of keyboards now and want something that sounds a little more like a real piano and less synthesized, particularly in the mid-range. I have found that I can tell if an artist is using a Kurzweil without even seeing it because of the distinct sound. If you love that Kurzweil sound then this is the keyboard for you!

Feature:
A single sustain pedal came with it, but a double pedal (with full sostenuto...ok, spell it however you like) is available for $30--and will worth it! The most useful features are its presets: 32 of them. Besides them, the rest of the options are darned difficult to figure out. It needs a good volume pedal; I have tried 3 so far, and none of them have worked. I am still looking for a usable volume pedal so I don't have to work the lever. The overall look is beautiful and professional.

Quality:
This is a solid, beautiful piano/controller. It looks, feels, and sounds professional. It seems to be rugged, because minor drops and spills haven't hurt it at all. Two years of regular use later, and I still think it looks and sounds like new.

Value:
At about $900, it is a great deal. It should come with some type of cover, though.

Desirability:
There is something kool 'bout the Kurzweil name--it has cache. It looks good with my Korgs on stage, and I get lots of comments about it from musicians and non-musicians alike. It just looks "pro".

Sound:
The piano sounds are top-notch, the strings are good, but all ensemble (I like some solo sounds), and the ballad organ is very good. The rock organ is pretty good, but not if you are looking for a B3 sound; the perc organ is not for me. The electric piano sounds are very nice, especially when cutting through the competing sounds of a band. Overall, the sound is a very good, although this is not to be confused with a dedicated organ--more a piano with some organ sounds.

Support:
I haven't had any problems, so I haven't needed to contact the company. Although if I don't find a usable volume pedal soon, I will be calling them and getting loud!

Overall:
I love this board, and I will have it a long time. I will supplement it with a better organ, though, This instrument would be perfect for me if 1) the organs were a little better, and 2) it was easier to program and set parameters. I have always loved Kurzweils, and wanted to own one since my cousin played one years ago. In the past they were too expensive for me, but now they are priced where most musicians can afford them. If I lost this keyboard, I would no doubt get another one as soon as the insurance paid off!

Feature:
This is a _stage_ _piano_. Nothing else. As a piano, the lack of half-pedal function makes it useless for much "classical" playing. The lack of diversity of sounds means that it's not sufficient for some applications. However, it makes a great controller for any other instrument / module / whatever, and that's partially what it's designed for. For example, the ribbon pitch controller doesn't control any of the internal sounds! The bottom-action is nice and hard - not as hard as the Yamahas, but much harder than the rubbery-feeling Rolands and Korgs. The dynamic control is excellent.

Quality:
This seems like the best-build digital device I've ever encountered. Period.

Value:
It is what it is, and no more. Richer, fuller piano sounds than the competition. Way warmer than most of the alternatives. If you only want a stage piano, and you care about feel and sound, it's either this or the Yamaha, or move to a way higher price bracket.

Desirability:
The richness of the bottom end gives me aural pleasure. Thick, fat, but not boomy. The hard action keeps me punchier.

Sound:
The main piano sounds are great. Warm, rich - they don't have the nuances of some of the multi-multi sampled top end pianos, but they're plenty fine for ensemble recordings; better than you'd ever need for a jazz gig. The organ sounds are limited, but thick, functional, fine for most things. The pads and strings are fine for ensemble functions. The only shortcoming is the E-piano(s). They're great for what they are, but they're the cheesier style e-piano, nothing at all like, say, a rhodes. Overall: Great, providing you understand that This Is Not A Synth!

Ease of Use:
The interface is easy but not intuitive. There's not much scope to modify the sounds. There's almost no scope to modify the tone, only the reverb, velocity sensitivity etc. Setting up MIDI zones for multi-instrument interface is slow, but simple.

Support:
N/A

Overall:
This is a fantastic controller; although for many applications, you'll need an extra module, this is the best cheapest controller around, and the piano sound is fantastic anyway. Although I do plan to get more synthesisers, I doubt I would be replacing this for at least a couple of decades. If a calamity should happen before then, I'd probably buy the same model.

Quality:
my first kurzweil was a k2000 and it played great for years no real problem with it . and this one will be no diffence .it great for the road playing 50 weekends a year.

Desirability:
i real not sure what you are after here i love the way it plays , sounds,it a piece that hard to beat.

Sound:
as far as myself it as close to the real thing as you can get.it has one of the best piano sound i heard.it fit well in gospel music and not loaded with sounds that we do not need.it sound good live and in the studio.we used a midas mixer klark eq's ev qrx speakers and lexicon reverb.

Ease of Use:
it very easy to get great sound run every thing flat on it channel.some time have to boost the bass a little. it very easy to used and no need to modify it sound.mamual is good and like i said it plays very nice.

Support:
kurzweil was very easy to deal with had a key or two to quite working and they fix them at no cost to me.that was on the k2000 no problem as of now.

Overall:
i well never buy any thing else i don't think.

Feature:
I like the basics - no frills

Sound:
Solid sounds - record well. Cuts through the mix.

Support:
Check out the website's tutorial.

Overall:
Perfect instrument for me. I am in a "back to basics" mode. This is just what I needed. Midi for organ clone. Plenty of solid piano and ep sounds. No fluff.

Feature:
don't know

Sound:
I have found theat the Kurzweil piano sounds to be fantastic. I have had a Korg Stage piano and a Triton and kurzweil smoked them both. I have played several keyboards including the Yamaha Motif but never has there been a piano sound and feel than that of the kurzweil. The bad thing is that is all the Kurzweil has. I hate the rest of their sounds. What I think is the idea setup for my curch is to have a Kurzweil keyboard and a Triton Synth stacked on top. That way you have all the synth you want on top and all the great piano on bottom. not to mention the B3 in the corner. I love that thing.

I heard a jazz musician play the Kurzweill PC 88 and I really liked the sound. Then I discovered that they don't make them anymore. So I just bought the SP88X. I'm really happy with it. It feels good. The touch is great. I love the sound.

this is my first kurzweil keyboard..i like very much his sounds,his keyboard,and his very user friendly programmed........i think so KURZWEIL is the best keyboard with an incredible piano sounds.....I WILL BUY IN NEXT TIME A KURWEIL K2600....like my favourite keyboardist..JORDAN RUDESS of Dream Theater...THANK YOU KURZWEIL!!!!!!!!!

Sound:
The sound of this keyboard is very nearly like a real piano, but I gotta say I was sad to see my up-right go. Not too much, though. The feel of the SP88x, is very good, it'll take a while to get used to after a real piano. I get along with it pretty good. I like the variety of sounds, and the transposition has come in handy too.

Support:
I haven't needed to yet, and I've had the keyboard over a year.