I have an L-Shaped desk and this mat fits perfectly. It seems sturdy and robust. I really like it...as much as a human can possibly like a chair mat...
I just wish they lasted longer. My chair mats tend to last about 3-4 years and then they are cracking and I need a new mat. But it's better than having your carpeting (or your wood floor) ruined. Just be sure to get the mat made for your type of flooring.