I used the original HS820 for years which was a great headset. This HS850 seems to match the quality of the original HS820 -- not the cheaper ones rolled out later -- with added convenience of the boom for on/off function. Sound quality is good and device connection is very easy. I've connected it to my Treo 680 and Blackberry Curve. I take this over the smaller dysfunctional brands or models any time.