My advice if you have a friend who has one see if you can use it. I have a friend who has one and I use the 2.5" strip the most. We've cut out a lot of drunkards path. It is wondeful for curves-anything with a curved seam this thing is excellent. It's also good for applique.
But honestly for the initial price of the unit, how expensive each die and mat is and how careful you have to be in cutting and placing your fabric to avoid excess waste for most things I don't like it. I find you have to practice alot to avoid excess waste. But that is only my opinion. I know people who absolutely love it and won't go back to cutting the old way if they can help it.
I recently won a baby go off the accuquilt facebook site. It comes with nothing. I feel that it's a "lost leader", we'll give you this cool little toy and you only have to buy the dies at $30-50 each and the cutting mats at $7 or so. But hey it was free, I'll borrow dies from my friend until I find a good price for dies.