There many, many blog reviews and youtube tutorials showing the pros and cons.
There are also some threads here on the QB.
A simple Google search will lead you to many of them:
https://www.google.com/search?q=cricut+for+fabric
I was looking at the Gypsy (in conjuction with the Cricut) so I could do compeltely original motifs/designs without relying on cartridges or mass-produced designs.