I have had the zen green for over 2 months now and still cant contour cut with it using ai us cutters solution was for me to go from photo shop to ai and than to corel what a joke, i have been waiting for over a month now for the ai plug in and nothing when i bought the zen green they said it was better than a graphtec and i would contour cut great well i am using a knife and as far as the zen cut it seams to not close the cuts sometimes. not happy but if us cutter fixes the problems i will post good feed back im writing this review as ive been on hold now for 45 min with us cutter good luck