Bought this speaker some months ago, and I'm actually not disappointed with it at all. It's a fine speaker for small events, but it's not good enough if you want a little quality. Even though I feel like you get more than what you pay for in this box. It feels sturdy, it's got okay sound, and it's loud.
Though I would recommend the littlebrother with the 12-inch instead, because of the 15 inches's "clicking" problem. This speaker can't handle all too much bass. If it's at a quarter volume, and you give it some bass to play with, it will make some high-pitch clicking noices.
But for a speaker so cheap, it's a really good build.