I bought this as a compact vocal solution I could mount to my pedal board. It, like most Boss products, is built like a tank.

Here's what I like and dislike:

Like:
* Easy to use and can run on batteries or ac input
* Tracks guitar signal fairly well
* Harmonies sound great, although like most vocal processors use them sparingly
* Nice that you can dial in the key easily via dial.

Dislike:
* You are basically limited to 3rds and 5ths, which for most should be fine.
* There is a glitch when changing the key's whereby the last key is not remembered and you have to always change the key prior to using.
* The input control is a knob, and not a particularly stable knob.
* The effects are also a knob and they are organized in a bizarre fashion. Reverb, Delay and Reverb, and Delay. It's hard to dial in exactly what you want.
* As others have noted it's difficult to read the text in a dark room/club, so if you're choosing keys you kind of need to memorize the layout or have a flashlight handy.
* The bottom of the unit is not flat, so it's actually NOT built to be mounted to a pedal board. A glaring oversight by BOSS.

All in all though for roughly $200 this is a nice little vocal processor and I'm happy with the purchase.

Very useful little pedal, using it for a cuban quartet and sounds great! :)

love it

Easy to use, and harmonies do an excellent job with harmonies on simple songs"¦ie if the melody is within the chord triad it will be spot on. Can get iffy on more complex chords. I like that the guitar input is a "thru". I play a digital accordion and can alter the sounds as I wish on the instrument, so I don't want that feature on this(one of the reasons I returned the boss ve8 for this). I also like the vocal delay..not an option on the ve8 as far as I could tell.

Nice voice harmonist