I have been looking for a good bluetooth stereo headphone which is not very heavy and capable of pairing with my laptop and mobile phone. I couldn't find many choices. One item that came up in all reviews is HT820. I looked at Jabra BT620s, and finally decided to go for HT820.Pros:- This headphone is comfortable to wear. However, I used to get an ear pain after a couple of hours- Sound quality is good when you use A2DP profile. I don't get the HiFi sound well. Low and high could have been boosted a little.- Battery life is good. I haven't tested it for maximum hours.- The call pickup button is big and easy to locate. I found the same with other buttons as well. I found these buttons large and comfortable since I have been using small bluetooth headsets for a while.- Mic seems to be good. No one complained to me so far. I don't use this in a place with lots of background noise though.Cons:- There are two identical buttons, one on right side and another one on left. I don't know why the right side one is clickable since it doesn't do anything. It was a big confusion for the first few days.- The volume should be more. Its difficult to hear or listen to music if we are in a noisy place.- Though the unit fits on my ear, I would feel more comfortable if I can adjust the length. I found this a little uncomfortable when I wear a collared shirt. The backside of the headset keeps bracing against the collar.- I could pair the device with my laptop (opensuse 11.1) and Nokia N96. Sad part is that, Nokia N96 doesn't allow me to set the profile and by default it uses A2DP. Moreover, my bluetooth mouse interferes with the headset when I use it with my laptop and the sound becomes very choppy. This is not a problem with the headset though.- I also noticed that my phone keeps reseting when I tried to switch on or off the headset. It stabilizes after a couple of resets. Nokia is not ready to look into this issue as HT820 is not a recommended accessory for them (Sigh...)Overall, HT820 is an average headset who wants to use it extensively on the move. Its comfortable to carry around and has a reasonably good sound quality.