Feature:
Liked USB port for recording and sound edit. Drum kit is OK (not to compete with dedicated drum machines), but execellent practice tool, which I use a lot. Tuner comes in handy. Quick button access to 4 patches (A,B,C,D) is great. More than sufficient for a bass gig. Loved bass cancellation feature -- can jam along easily with songs input from any MP3 player through the AUX in. Able to shift pitch too! USB recording works (though my laptop produces hum due to ground loop...no fault on PX5D)

Quality:
Feels plastic. But no cracks yet. Unlike pedal, doesn't have to be built like a tank since you are not stepping on it.

Value:
Product is really unique, not a whole lot out there now. I was looking for a compact and light, easy to easy, good sounding, bass effect box that will also function as tuner, trainer and provide drum patterns for practice. Met all of my expectations. Wished it came with power supply. At this price range, should throw that in. Had countless fun hours with it.

Desirability:
Easy to use is what I'm looking for...who cares what it looks like? It's probably hidden before your music stand if you gig with it.

Sound:
Use this unit mainly for bass playing. Bass playing doesn't require lots of effects, so I would say overall am please with the bass effects. Makes my not so high end bass guitar sounds much better. Fretless effect, though, could be better.

Ease of Use:
Simple to use. Sound programming best done with editor. Didn't need the manual much after first few references.

Support:
haven't contact yet. No comments.

Overall:
Love it. Would buy it again if lost or spoilt (hopefully by then PX6D?!!)...have used it extensively for about a year now. Great product.

Feature:
Amazing for its size

Quality:
Seems to be well constructed. I have only had it for a month in home stidio use.

Value:
A lot of good effects in a small package make this a good value for me.

Desirability:
The best feature is that the unit can be kept at a height that is comfortable to use since it does not require bending over to change settings on the floor as is necessary in most effect modules. It can still use pedals for effects by plugging them into the unit. If you buy this you need to have the ac adaptor since battery life is pretty low, especially if the backlight is used.

Sound:
The various effects may not be quite as good as larger and more expensive models, but all that I need is there.

Ease of Use:
Relatively easy to learn.

Support:
No contact with Korg has been necessary

Overall:
I beleive the use of technology in bringing the size of this unit down so much that it can be carried in you pocket is amazing. I use it in my studio, but it also allows me to play anywhere with earphones. The drum machine function has plenty of programs to enable practice with a wide range of beats by drum and bass. Changeable bass key is very useful when practicing in the actual key you will be performing in.

Feature:
gave it a slight bump for the usb capabilities. but recording with this thing is no good. not powerful enough to run a track of guitar and midi drums at the same time without constant cut outs. really dissappointed by the sampling time to for recording internally. 100 secs not a lot of time to do anything great.

Quality:
seems solid enough. wouldn't want to drop it though

Value:
i probably wouldn't have bought it if i knew how crippled it was on the usb. a cheapo toneport does the same job of recording. haven't messed with tweeking patches directly via usb yet.

Desirability:
would be good to get some rough ideas out fo the way but only 100 secs max sample time recording internally isn't enough to flesh out a whole song.

Sound:
Sounds are okay. Definetly need tweeking.

Ease of Use:
you have to read the manual to get around this thing for sure

Support:
haven't needed it so far.

Overall:
i guess i was dissappointed because i had high expectations. this bit of kit seemed like a songwriters dream for a while but i can't say its helped much. i think this thing should go for a 100 bucks cheaper.