I have one of these, and I wish it would recess down (or go down) so that it wouldn't turn when you do your cutting on the mat, then lift up when you quit cutting. It frustrates me when I start to cut something on it and it starts to rotate, but it doesn't do this all the time...I guess I get heavy-handed when cutting sometimes, causing it to turn. Other than that, I like it, as it has the self-healing surface and it is a great surface to cut on.