Feature:
Great features. Yes, the microphone modeling is not as extensive as the software, but you'll pay way more for the Microphone Modeler, Auto-Tune, Gate, EQ, de-esser, etc. than you will just for the AVP. If it had all the features of the software, it would cost twice as much. Luckily the auto-tune algorigthm is identical to the software. Sure, there could be more features, but hard to find how at the price point.
Quality:
Unabalanced connectors is my only caveat
Value:
For barely more than the auto-tune software you get the same pitch correction and way more features.
Desirability:
Practical addition, keep it a secret while playing live ;-)
Sound:
Auto Tune can't be beat. It sounds very seemless. The guy in one review here seemed to think it was hard to get it to be seemless.. either he is trying to sing for the first time in his life, or he is totally incompetent. I was able to successfully leave it on chromatic and it sounded perfect with no artifacts! But I am a decent singer.
Support:
Easy to get ahold of, very helpful
Overall:
AWESOME!!