I've used three bluetooth headsets, and the Treo 650 Wireless Headset is significantly better than any of the others. The Jabra Freespeak 250 fit well but had an unacceptable amount of static (a problem others have mentioned). The Sony Ericsson Akono HBH-660 Headset had no problems with static, but the volume was too low (which made it difficult to hear in noisy environments) and the earpiece didn't fit well. The Treo 650 Wireless Headset has no static, is louder than the Akono, and fits very comfortably.