I have been using the HS810 for 9 months now. I was initially very impressed because of the small size and its being relatively stable with a number of different phones. (The early blue tooth standard isn't really as "standard" as one might hope!) However, it has proven rather fragile. Within 2 months the plastic case began breaking next to and inside the hinge for the on/off switch. Did not impact usability so I didn't care. For the last several months it has been hard to get a good connection witht he charger (several of my colleagues are having similar problems). The headset has recently become useless because the main body of the case has cracked. I keep the unit in my briefcase, so I don't know why it is proving as fragile as it has. If you can use it (or the similar HS850) with some assurance that it will not be crushed, it is a good choice. Otherwise, I suggest looking at other designs.