Have an Edge CTS2 that I got from 4wheelonline. It is a large unit so I can easily check different PIDs. I can monitor the EGT during the regen process. The only con I can say is that the screen response is a bit slow.
The Covercraft Noah is one of the best outdoor covers I've tried. Whatever brand you choose, be sure to clean your car first before using a cover to avoid unwanted scratches.