The lack of a Wacom style digitiser seems to be it's biggest critique (aside from price). The point about their being only 1 USB port is a good one, I wonder if it's possible to charge the device while using the port if you have a USB hub...seems unlikely.
I know that the Asus Vivo Tab Note 8 has the Wacom digitiser though but has a much lower res.
Also wish that these 8" devices had seperate ports for charging and USB.