The Bluetooth pairing works problemlosmit iPhone 3G, the music quality is good, the range of a few meters also.
Sometimes there are small dropouts (probably signal interference), but overall not very disturbing.
The batteries (standard AAA) keep for a long time, a surprisingly long time (1 week, 3 hours a day) and are still not empty.
The only drawback, there is no Haltevorrsichtung, an eyelet or loop would be good to secure the speaker when you use it on the go.
Highly recommended.