I took the new iPad to figure drawing tonight. It ended up pretty well. I'm getting the hang of it. I'm definitely slower with the iPad than I would be with Photoshop and a Wacom, but it would be damn inconvenient to drag a laptop and a tablet around with me. The lack of pressure sensitivity sucks, but it's just a limitation to work around. Hopefully there's some shortcuts I have yet to discover that will allow me to more easily resize the brush and adjust opacity. Color picking works well. I'd say with some time, I should be able to bust out some good work with Sketchbook Pro.