Congrats! Its really nice having something like this! It's great popping out a hundred triangles(or hexs, or squares, etc) in no time at all!
I have the Cricut Expression, and I love it! I can cut any shape that I can see on my computer screen.
I also have the Sizzix, which is manual, while the Cricut is not. I don't use it near as much, though.