After playing with the P1510D at CES and the Mobile Brief, I found the tablet to very nice and light. However, the lack of a pc card slot is a deal breaker for me. I also had issues with constant pen bleeds due to my wrist putting too much pressure on the screen. The lack of a hover also bothered me more than I thought it would.
Check out TabletPCReviewSpot.com’s review for a good colletion of photos, battery tests, and hard disk tests. Nobody does a hardware review like the folks at TabletPCReviewSpot.com