For CHARACTERISTICS, see the website builder, etc ... (I know it sucks, I too was m'nerve when others do).
I would add over Previous notice that the VP-550 is used as a vocoder with any external source. So the sounds are far from being so limited ...

UTILIZATION

Configuration and shipping very simple: there are so few buttons it is not clear how one could get lost ... The manual is well on his trs.

SOUNDS

The sounds, the sounds ... ah Here we are. The sound board is good, it's true. I remember the chorus (including classical, try bohmian rhapsody is stunning and fun trs) and a two synthetic sounds, trs trs basic but well-equilibrated the other dj as wearing a kind of phaser or flanger that makes too typical and identifiable I got ....
Ct vocoder, t really have a great if ... we did not have a weird problem mute on certain consonants or sibilants too Chuit ... the cut is and is not trs brve systmatique trs agaante but it is when it occurs. May be a firmware update is it available to rgler this problem, I will look ... Meanwhile, j'enlve 2 points as I am frustrated at not being able to properly use the vocoder mode.

OVERALL OPINION

I have been using prs a year and tried a lot of vocoder DIFFERENT, but not high end, it is true. What I like most: ease of use, quality sound
what I like least: the mini-breaks on certain consonants only mode vocoder (voice + external instrument)