I did a few more cuts, and on various materials. Knits, quilting cotton, foam, batting, and denim. All cut okay-sometimes the cut seems less on the white. But now that I've been doing all this cutting I noticed something. On the green mat I can't even see where I've been cutting. On the white mat I can see pretty much every cut. It's smooth-it feels okay. But between the two the healing is definitely better on the green.