The sound is what we expected. For its small size the Mobile Boombox sounds very good, even with the volume maxed out the sound doesn't distort. The volume doesn't go very high, however, and the sound is very directional. Like most Bluetooth speakers, the Boombox sounds better when you hook it up with the 3.5 mm jack instead of Bluetooth, but the difference in quality is not so much that you always need to bring a 3.5 mm cable along.
Bass-heavy music won't sound right on the Mobile Boombox. Songs where bass is not as essential sound better, even if there is a lack of detail and dynamics. It's basically in line with what we've heard from other mobile speakers, such as the X-Mini Max models. The latter do not have Bluetooth, but they are a lot cheaper and feature better stereo. Even Logitech's own Wireless Speaker sounds better, with or without iPad compatibility, but it's also bigger.
Logitech claims a single battery charge will last 10 hours, but you can't blast the volume if you want it to last that long. At normal volume the battery life was long enough to support Logitech's claim. The Boombox charges very slowly, however, it takes four hours before it's completely charged.