Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Versatile instrument

This omnichord has more options than I could have ever imagined. I'm still at the simple stage of playing, though. The only thing I am disappointed about, is that almost invariably, at some point in my playing, it begins to play other notes than what I am pressing, going sharp or flat and wreaking havoc with my practice. It's in a controlled environment, so it is not the humidity or changing temps that can be affecting it. Nor does it matter whether I'm plugged in to AC or DC. It can get "temperamental."