It' OK quality for being fairly inexpensive but it's far-and-away not the best plastic carpet-protecting chair mat I've ever bought. Give it about six months and it will start to fall apart just like the last one (similar) one that bought at Staples. I'd really like to see a mid-range mat one that holds up for a couple of years around the $30 - $55 dollar range. Your top quality mats are just too expensive at $60 - $90 a pop.
The description says that it's for berber carpet. We've had it for 2 weeks and I can already see where the chair wheels are digging in. It looks to be wearing the same as the last mat that didn't last a year!