I've got one of these. It's pretty okay. It doesn't hold a candle to computer speakers in the same range but you can't really expect it to. It's a notable improvement over phone speakers (comparing to note 2 and moto x) and can definitely play music louder and clearer. I leave it in the bathroom to have music while I'm showering.
Would people be interested in a sound comparison? I'm not really well versed in music enough to tell you how it handles various frequencies or anything like that.
Sound quality's roughly 3/5. Overall I'd call it 4/5 because it looks pretty cool, the battery lasts long enough for my purposes and it's not too expensive. Bonus points for doing bluetooth as well as a 3.5mm input.
I don't think people buying this will be disappointed but you'll have to manage your expectations a little bit. It's not going to blow you away.