I love Design Studio. There are people who will tell you all the things they Gypsy can do that they think Design Studio can't; and they're wrong about most of those things. And there are people who will tell you to just use the free Cricut Craft Room program, but for my personal use I'm pretty opposed to using a program that requires an active internet connection in order to do anything.
Design Studio has a bit of a learning curve and a neat trick to get it to load faster. I like it a lot.