One really positive comment on the Q550.... You can pull the Q550 out of the dock anytime without any problems. I've been using it for over a week now, with dual screens, several programs running, not in sleep mode, and just disconnect it from the dock - no issues at all. Write some notes with the pen, put it back in the dock - no problems. Pulling it in and out of the dock at will doesn't affect it at all. This is a very good feature, as other tablets I had always had to be put into sleep mode, then removed from the dock, what a hassle that was. And, if you forgot to sleep, the tablet got all messed up and needed a reboot.