I've used a HS850 for some time now, the volume is not loud enough for me while driving and I have to hold it against my ear (so where is the convenience), the wife complains about an echo. I recently bought the Hummer X-II that fits in the ear but the volume is way too low for me. I took it to the VZW store and the rep said that the volume compliant is common for the BB. I'm thinking of returning it and getting a jawbone as I'm around background noise often.