I've had one for a couple of years. I have all of the Disney cartridges except for Cars. I almost bought it yesterday at Michaels. I love it. I used it when we went to the World in 2008 for the custom autograph books with Mickey on the front & Micky & Minnie on the back.
FYI: The Silhouette is a Quick Kutz, not a Cricut. Looks like you can do True Type Fonts up to 8 inches, but not the specialty items like the Disney cartridges with the Princesses, Faires, or the Fab Five. The Cricut Expression does up to 24 inches. I haven't used it often that large, but we printed items for the kids walls and they love have the personalized sayings on there.
If you are getting jagged edges, change the blade. Sounds like it's dull.