Feature:
I bought this unit to use for vocal harmonies in my recording studio because I can never find enough good male or female singers to record back up vocals. This thing works! I did some back up vocals on a heavey metal rock tune using it for recording, and I had Def Lepard/Van Halen back up vocals in the proper harmonies, major or minor, no problem! Whoe! I was impressed. Then I tried some Queen vocals, guess what, worked very cool! I played sand some Crosby Stills Nash & Young through this harmonizer, and I could not believe I sounded like them! Wow. I tried Amy, by Pure Prarie League, the Eagles, etc, and this harmonizer does the job, Rock or Country, whatever you play, changes vocal harminy chording with your guitar. It keep you in pitch too, based on A 440 and IQ harmonic tracking. It also saved me recording tracks as well, as I did two separate harmony tracks, used only two tracks, and this would have taken 8 tracks using real singers on their own tracks, not to mention saving set up time, mike cable speghetti mess, headphone cable mess and isolation problems for groups of back up singers in small studios. I highly recommend this harmonizer for live stage and in personal recording studios. ...It's also a lot cheaper than all the extra mikes, cables, and headphones, and more reliable than all the back up singers you were going to hire. I give this a 9 because you can always pay $5000.00 for better and more features.

Quality:
Seems to be built solidly, but you might want to duct tape the power cord to keep persons from disconnecting the power supply wall wart.

Value:
Very good investment for stage and home recording studios.

Desirability:
I want the bigger Digitec Guitar Live Harmonizer 4 now. :)

Sound:
I give this Digitec Vocal Harmonizer 2, a ten (10)Plus, considering it costs $349.00 and not $5,000, and it really works. It is easy to use even without my eye glasses on, just grab a knob or push a button and dial up the harmony reverb, and vocal compression you want. Great onstage,easy to adjust on the spot. "On the fly' adjustments of reverb compression mix, harmonies is nice.Just turn the knobs. No programming.

Ease of Use:
I'm going to get an extra one, the Digitec Vocal Harmonizer 4 for guitar which has more features and stereo XLR outs for my recording mixer. This is a very good investment for your live sound and project studio and very easy to use. Kenny

Support:
Never dealt with them for support.

Overall:
This gave a big bang for the buck. I won't need another or better unit till I get %5000.00.

Feature:
The item includes everything you need to use it straight out of the box, aside from 1/4" and/or XLR cables, but if you're intending to stick this in your signal path, you should know what cables you need. It is a high-current draw device, so you can't run it off a 9V battery (even though it is a 9V device), and you probably don't want to share a power source with other pedals. The power supply is included, but it's one more thing to lug around and plug in. It is of the power brick variety (cables on both sides of the brick), not the wallwart variety, so it will not block up your power strip. Setup is really simple -- insert it into your vocal mic signal path FIRST, and your guitar or keyboard signal path FIRST (both very important), and it will just work. No programming necessary, just make sure your chord instrument is set to A=440 (Roland keyboard owners beware, you will have to tweak this since your keyboard defaults to A=442). Using it is just as simple. Do you want your added voices above you, below you, or one of each? Or do you just want one extra (in which case you pick "unison" for the other)? A footswitch turns it on and off. It would be nice if the High/Higher/Unison/Low/Lower switches were accessible without bending over, but I can't really see how they'd do that without a remote control. It also works just fine with a keyboard as the chord input device instead of a guitar. Singer/pianists should absolutely consider this a valid option. It even works when I stick a microphone in front of the piano amp, rather than taking a direct feed, though in this case it tracks better with a little bit of preamplification of the microphone signal. One thing it could use that it is lacking is an octave up or octave down option, though this can obviously be solved with a second stomp box. However, given how well it does at keeping voices sounding like humans and not chipmunks or whales, having it do octaves would be a very nice touch. It also includes a built-in chromatic tuner. Non-guitarists are unlikely to use this much, but it is there.

Quality:
They could have used metal 1/4" jacks instead of plastic, for durability. Otherwise it's pretty sturdy. There is no dead weight to keep it still like some pedals have, but the large footprint (for a stomp box) makes this somewhat unnecessary. If it does tend to wander off, a sandbag behind it will do the trick.

Value:
This item does a commendable job for its intended purpose, which seems to be making a singer/guitarist into a one-man band. It does a reasonably good job when used in an off-label manner as well. For $300, I have absolutely no complaints.

Desirability:
It's not fancy. That's not to say that it's ugly (it isn't) but it's not decorative either. Who cares, it sits on the floor!

Sound:
The non-pitch-related effects aren't great (I keep them turned off) but that isn't why I bought this item. This actually does a commendable job of not making the harmonized voices "chipmunky", whether they are above or below the lead. It also works well on wind instruments, with a caveat -- you need a good, clean signal from the instrument or the box gets confused. Flutes and brasses should do just fine, saxophones and clarinets can be too hard for it to isolate at full nightclub volume. The sound can be a little bit on the "tinny" side, but it's nothing severe. If you mix the harmonized voices separately from the original, you can EQ that problem away.

Ease of Use:
Using it is a piece of cake, aside from the bending over mentioned above. It really does listen, you don't have to tell it a whole lot. Once you find a signal path that works (not difficult), there's not much intervention required.

Support:
No experience.

Overall:
I would only consider a replacement if it was significantly better in function -- maybe if it had a remote control, maybe if they added the octave as a harmony option, maybe if it somehow isolated my sax sound better (though I think that's asking an awful lot in a nightclub) I would consider upgrading. I don't need the four-voice version, so I won't be likely to upgrade to that. If it were to break under circumstances that were clearly not the manufacturer's fault, I would buy this exact item again.