No "Blues" about the HS850
Size, convenience and function are all good on the HS850. Voice quality and ease of turning on and off work well. Does not fall off the ear with any motion and is very comfortable. Needs charging on a separate charge from the phone and a little more frequently. When the arm folds in, the Bluetooth is easy to carry in pocket or purse. It is about the size of a large button. While night driving the blue flash can be a distraction to some passengers.