I have a Making Memories self-sharpening rotary cutter and I really like it. I've been using it for a couple years now I think and its been working great. No need to replace blades and cuts cleanly each time. I even cut heavy cardstock (200#) that I use for making boxes and it hasn't faltered once. You can get them at Michaels with a coupon. I'd wait till you can use a 50% off coupon if you can hold out for one.
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