Summary: I got this device for Christmas one year. Once you get used to the fact that you are looking up at the screen and drawing elsewhere (i.e. it's not like drawing on paper where you see the lines under your pen), it feels very natural. The device is very solid. I use this mostly for editing photos. With a mouse my hand cramps up, but with the pen I can work for hours. The only thing I don't like is the fact that the pen needs a AAA battery to operate.
Pros: Good Control, Increased Productivity, Lightweight, Natural Feel