Greg, congrats on your purchase.
I have a similar unit, HP tx2000 convertible laptop / tablet PC. I'm very happy with it. I only have the standard battery, which lasts about two and a half hours, or less. But that's sufficient for my needs. While driving, it is plugged to a charger, so I seldom rely on the battery anyway.
The touch screen is a nice to have feature. I'm a keyboard person, so I could happily live without the touch screen, but since it is there, I occasionally tap on some of the big Garmin Mobile PC buttons.
The main feature that I like about it, is the small size (12" screen). I think this is perfect size for my needs. It's not too big.