I have a Cricut Cake and really like it. It takes some practice but its really nice. I put my fondant in freezer on the mat for a little bit before cutting so it doesnt tear as it goes. For chocolate fondant it was sticky after the freezer so I just let it sit out for about 20 minutes to harden before cutting.
I had a Cricuit Cake and I absolutely hated it. It was just not user friendly, I sold mine for the exact amount I paid for it.