Instruct: Classify an Amazon review into positive or negative sentiment.
Query: business!

This cd is the proper business. Its just ridiculously vibrant, rattlingly, soulful and mechanical all at once....with a lot of bass and toasting. A useful primer to some wicked tunage- when people wet themselves over the latest r and b producers' knobtwiddling, its good to be reminded how much more amazing and mental the future sounded 15 years ago. Ragga Twins stuff is interesting i guess historically, although I swear that rave music's many varied iterations had a lot more to do with incubating jungle than them two, though respect is due, and all that. Massive.