Feature:
Wish this had an internal power supply and not that feeble wall wart transformer that is ships with.

Quality:
Wish there was more metal on this, but it is still quite solid.

Value:
I own 2 of these. One for a backup!

Desirability:
This question should be removed from this list, makes no sense whatsoever. This is musical gear, not a porno film or lingerie.

Sound:
No sound quality at all on this, but it is a GREAT switching system. Very flexible! Heard this referred to as the Swiss Army knife of MIDI foot controllers, and I'd say that is a great analogy.

Ease of Use:
A bit confusing programming, but careful study of the manual should help to clarify.

Support:
Have had to call on programming for this, but it has all been quite helpful when you get your call back from Yamaha. Usually a 24 hour turnaround on help.

Overall:
I hope this lasts longer than I do, as it is used daily by me and has thus far been reliable.

Feature:
Its very versatile which is its most useful feature. Its lack of a CC controller input specifically for Tap tempo (or other on/off functions) that can map to multiple devices is pain.

Quality:
Very well made. The footswitches are solid and easy to find and hit.

Value:
Since there is nothing else that I could find that does what this does, its value is high.

Desirability:
Its a pretty cool thing. Nice LED displays

Sound:
There is no sound but it does make expressing the sound potential in MIDI gear very well.

Ease of Use:
Fairly easy to use once you get the hang of programming it.

Support:
Dunno

Overall:
I've owned mine for over two years now and I still use it as the central MIDI controller for my guitar rig (w/ two amps/processors) as well as controlling my light setup through a MIDI:DMX converter. I'd replace it if they made the improvements suggeted in the "Feature" section