I use mine with a 45 Martelli cutter. Works great. You do need to start at the bottom slot to cut the best.

I use my 45 mm Olfa cutter - it is at least 30 years old - before they were changed to be more ergonomic. It doesn't have all the safe guards on it either. It has a bit - but my second one has more protection.

I seem to have better luck, using my larger (60 mm?) Olfa cutter.

I have a blue Dritz that I love for everything else but it doesn't work with the Shape Cut. I use my Olfa 45mm.

I'm a Fiskars girl and use either my 45mm or 60mm - whichever is nearest, with no problem. That said, I have nicked the plastic a couple of time when I haven't been paying attention.

I use a Fiskars rotary cutter with mine. I used to knick it all the time, but I seem to have gotten over that....or else I have already nicked all the possible places I could nick? I actually and three Sew and Cuts. One is larger (18") and one is duck taped together where I bent it and it broke. The one with duck take is my "go to" one though. Not sure why. Maybe it has fewer nicks??

Dina

I put the blade in the slot and then back it into the starting slot and then cut. I never nick the ruler doing it this way.

My Olfa 45mm works for me. I am careful when putting the blade in the starting slot. I use the June Taylor Shape Cut several times a week.

I have Olfa and Fiskars and I don't have a problem so far. I've been cutting a lot of fabric and use my Shape Cutter. I have the 45 and 60. That is not to say I won't in the future. You know how it is when you speak too soon.

I have cut the plastic many times, I think it ruins my blade. But I do really like the shapecut plus... .makes things much easier