This arrived today in a HUGE box rolled up. The contruction is not an issue if it was shipped flat. As it stands now the edges are curled upward (I'm constantly tripping over it) it's buckled all over the place so that a chair does not roll easily on it and did I mention it came rolled up? Terrible shipping. This should have been shipped flat like the last one I ordered nearly eight years ago. That one lasted a long time. I'm just about ready to throw it out if the plastic doesn't settle flat on the floor.
Already have dents that make it hard to roll out of. This is supposed to be for deep pile carpet up to 1" thick. I measured mine as most chair mat calculators tell you to do. 1" includimg the carpet pad. The nubs are described in the answer section as 1/4". They must have change something cause mine is less than 1/8" length but is 1/4" wide. I thought the whole idea for high pile carpet was to have longer nubs. I am on my 4th chairmat in the last 10 years have tried different kinds. Bottom line is that none of the PVC mats will last and not crack or create dents. I will probably be returning it.
Works just well enough on mild thick carpet but cant imagine using on anything considered plush. Small divots form if sitting in one spot but easy enough to roll out.