It's possible I ordered the wrong one for my rug but the chair mat is too pliable. The chair rollers indent the mat and the mat moves around a lot. I constantly have to rearrange it.
I have finally found a desk chair mat that will last more than a year or two. It does not "dimple" very easily from the wheels on the chair. The chair rolls easily on it.
The plastic seems pretty lightweight and not very rigid. I don't think this mat is suitable for anything other than a hard surface floor. When used on carpeted surfaces this mat will show indentations from your chair legs/wheels.