The mat is exactly what I needed and is working well for me. In fact my daughter saw it and asked that I order one for her which I did. She is also very happy with hers.
Love the fact that I don't have to lift desk to get underneath. Good rectangular shape. Problem was with the sticker. Left a terrible sticky residue that was not easy to remove.
It's good. My chair is about 7 years old. Maybe it's heavy because there's already a depression in the mat where the wheels are. Still keeping the mat. Glad there's a one year warranty on the mat though.