This mat is too soft. When sitting in my office chair it leaves dents that trap the casters of the chair and make it difficult to move around. I've had the mat for a week and the dents are becoming wide and lasting overnight and during the day. I'm concerned that they will become permanent. I'll have to return this and try a stiffer mat.
This floor mat is nice and easy to move but the downside is that it is thin and moves into the desk and curls under. This is likely caused by a wheel hitting the edge of the mat.