A standalone image creation and editing platform this is not.
Fully supports professional graphics tablets, although none of the default brushes seem to use tilt, bearing, rotation etc.
I'd like to see more experimental input options such as audio.
It rather reminds me of Alchemy, or of the newer Painter X3 gravity brush engine etc.
It could really use a brush size lock (zoom in = bigger brush-or rather, the brush stays the same size relative to the screen) The same behaviour really irks me with Mischief too. Seriously, toggle this feature on and off. This is the one and only thing I can say I actually hate about the app. Sadly I really really HATE that behaviour.
It's basically a very slick digital painting app with very limited editing capabilities and a single, very fast, robust, and customisable brush engine.
It's fun to play with but I can't get my head around the brush editor and I hate the brush size behaviour.
It's very good at what it does but it is kinda awkward, and expensive, and Windows only.
It would be unfair to review it on tasks it's not designed for so that's it.