Cougar Studies

Hey guys,
I'm thinking about animating a big cat test and did some cougar studies for practice. I did these using Mischief (www.madewithmischief.com/), as my trial is going to expire soon and I haven't used the program enough to make a decision on whether or not its worth buying. Do any of you have experience with Mischief? The infinite zoom continues to blow my mind and its been the only program where I feel like I can really (comfortably) draw digitally. That being said, it lacks things like pressure sensitivity controlled opacity (they say that's on their to do list), the ability to make selections that aren't squares, and only have a few brushes. Have any of you guys tried painting with the program or anything? Please feel free to let me know how you like it if you've used it!