ArtStudio for Painting and Drawing

As many of you know, I've become quite a fan of painting and drawing on the iPad. I've mostly been experimenting with Brushes, but I stumbled upon this short video by art educator, Kevin Honeycutt, on ArtStudio. At $2.99, ArtStudio is a tad bit cheaper than Brushes ($7,99), but neither will break the bank. In my opinion, Brushes has a distinct advantage over ArtStudio in that it records the entire drawing process in the form of a video.

What is your favorite painting and drawing application for iPad? What are your thoughts on this medium for making art?