Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Amethystium is the best!! Love this music to work in my office!

Amethystium is a great producer of an ethereal sort of soft rock. Great to get "lost in", whether in work, concentration, thought, or even exercise. Great work. Of course, it's hard to top CELTIC THUNDER :-) Do yourself a favor and look them up.