Summary: When I bought the Nokia BH 505 there were not many choices for stereo bluetooth headsets. I liked the head band idea but this design with the slightly flexing headband always popped the buds out of the ears and broke the isolation making it lousey to listen to with all the ambient sound (and sometimes noise) interfering. I gave them away just a couple months later.
Pros: Not many- one of few avialable when first released
Cons: Mediocre fidelity, lousing design for staying sealed in ears
Pros: Small, comfortable, good sound quality (when it works), good battery life
Cons: Appalling echo for people at the other end of the line - simply unusable for phone calls Constant dropouts - unsuitable for listening to media. With those two faults what is it good for you might ask - not much.
Pros: The excellent construction, great aesthetics and good color combination makes it a real treat to use. The apt positioning of the buttons. The provided extra ear buds. No wobbling when using it while jogging. Sufficiently good battery life.
Cons: Found a bit of trouble connecting it to the iPod Touch 4G. But all other devices, namely the HTC Desire, a Nokia 5800, an Acer Tavelmate and a Toshiba Satellite laptop could detect it easily and connect automatically once it had been paired.