I intended to use this in the house rather than the car, so keep that in mind. It might work well in the car, I haven't tried it yet. But, in the house, it has three big issues:1. Loud background noise.2. Volume on source (iPod or whatever) AND amplifier must be cranked.3. The light indicating the device is turned on is incredibly bright, ridiculously so. That's got to eat batteries.Edit: I have now relegated this to the car where it's acceptable. The road noise seems to cover up the hiss generated by the device. I still am not sure about battery life, however. Too bad they didn't make it so you could plug it into the lighter.And the light is still too bright.