I personally use ScreenFlow for screen recording, when I write a tutorial or when I want to share something from my Mac. It’s a very powerful app for Mac, and it does much more than just recording your screen activity. See the presentation video on screenflow website.
I’ve also used ScreenFlow to record the latest tutorial, where you can learn how to combine body parts using Photoshop, cool right?
Download screenflow right now (don’t update if asked, you’ll see why :-) )