Mountain Lion has been out for a couple of days, available for just $19.99 on the Mac App Store. Judging by our server logs, many of you have already upgraded to the latest Apple OS. For those still on the fence about what exactly you're getting for your Jackson, we figured we'd explain the top user-facing features of OS X 10.8. Sure, Apple is touting that Mountain Lion includes over 200 new features, but redesigned scroll bars are hardly anything to get excited about. Here are the Mountain Lion features that prove that $19.99 is a steal.