Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work

As in one of the other reviews, I received this item and it would not power on. I exchanged it for another one, same thing. Amazon exchanged it again (they do have good customer service) and now, on my third different Shoqbox it will NOT power on. So it's useless. Not sure if this is just Amazon stock or what, but I have now been through 3 of these and not 1 would turn on. Can't comment on it's features since I couldn't use it, but it is a good concept, but maybe replaceable batteries would have been a good idea. (and of course expandable memory).