This Bluetooth speaker started my obsession. For such a small unit, the sound quality is superb. The speaker will easily fill a room with rich deep sound. Unlike cheaper speakers, there is no distortion or loss of fidelity at higher volumes.
In terms of quality, the speaker feels well built and quite heavy. It connects successfully every time and the battery lasts for many hours - long enough that it doesn't become annoying having to charge it. Although the included dock makes charging very easy.
I tried quite a few speakers before deciding on this one - at this price point and indeed for any speaker under £20 this is the best that you can get.