Well...I didn't take a lot of time on which Bluetooth headset to buy when I looked for several different kinds on internet and stores. I had Motorola Razor V3 model and HS850 has so far turned out to be an excellent buy for me! I'll be short here...Positives: Very clear and extremely convenient to use, 5-stars to the "charge-life" (I charge it once or maximum twice a week), goes easy on both ears, very light.Negatives: When the volume is on High, the listener on the other side may hear his own sound (I have to lower the volume to avoid this). Another downside (I am not sure if you will call this a "Downside") is that when I use this on trains or traffic areas, this headset pickes slightest of the noise in the background and the person on the other side of the line might get irritated a bit.In the end, I am happy with this little thing.