I believe you are referring to HS-810. HS-810 and HS-850 is basically the same except HS-850 supports Bluetooth V1.2.
Anyway, 60+% of all Bluetooth headsets available in the market uses chipsets from 1 particular supplier so chances are that their operation and performance are similar.
I am using the HS-850. Long battery life coz when you fold the boom, it switches off. When the phone rings, just flip out the boom and it switches on. Connects fast so that by the time you put it to your ear, the bluetooth is already authenticated and connected.
The pouch could have been better made though.... I dropped one when it slipped out of the pouch...
Too bad I just sold the Motorola 850 for 50 bucks to my cousin. I am now using the Jabra. I've used many Bluetooth device before but the Jabra FS 258 is the longest battery life and teh most comfortable. True is looks big but you can leave it in your ear the whole day without feeling any discomfort.