From Toon Boom Animation:
Animate brings together the most advanced animation feature set available on the market, all embedded in a flexible environment: vector, bitmap, symbols, pegs, camera, morphing, inverse kinematics and advanced lip-sync to name just a few. Toon Boom Animate user friendliness and advanced creative capabilities make it a cool addition to your animation toolkit. Its shortcut sets fit so nicely into your friendly circle of Adobe products and animation techniques that you will feel comfortable in minutes.
Toon Boom Animate adapts to your creative ways whether you are trained in traditional or digital animation. It also supports most standard formats for seamless asset transfer and multi-channel digital output.
It makes animating easy, it never crashes like flash does and the steps to making an animation are way easier than that of Adobe Flash, although there are hard steps to take when it come to Toon Boom Animate, the video tutorials on the Official Website are accurate and easy to follow.
As far as I am aware Toon Boom Animate Crashes from time to time, but I haven't experienced any
If you are to choose between Toon Boom Animate and Adobe Flash CS4 get Toon Boom Animate and if you choose Adobe be my guest but its your mind you'll be losing, I'm not giving any personal attacks I just think flash is overrated