I dunno about the Blackberry compatible bit, but I'm using a Motorola headset with a a Samsung phone and it's fine. It has excellent standby time- I charge around once a month, I never lose the connection, it has good loud reception. I can answer calls with one touch of a button on the earpiece and using the the volume buttons on the earpiece I can scroll through recent calls, so there's no need to touch the phone in the car at all.
The only thing with it is it doesn't fit my ear that well , there's no danger of it dropping off, but if I tilt my head sideways it sort of hangs away from my ear which is annoying.