We purchased 5 of these matts for the office area and they are ALL severely cracking within one year! I would never suggest these matts for anyone's use!
It did not hold up to 40-50 hour work weeks. Next time I will order a thicker one even if it's more expensive. In the long-run I will save money. This one in less than 3 months ended up cracking where my chair rollers usually sit. And yes I need to loose about 30 lbs. BUT I've bought other thicker ones that last for over a year.
Product is advertised for carpet up to 1 inch thick (incl pad). My carpet is about 3/4 inch and the mat sinks into the carpet makeing it hard to roll my chair. It should be thicker/harder.