I've barely had this a month and already it's curling at the edges and sagging in the middle. I wouldn't buy this again. I should have pried the lock off of my wallet and gone for the more expensive but more durable one.
This mat seems to be an adequate replacement for the mat I had. I am a big guy and the wheels of my chair leave indentations in this mat when they didn't on my previous mat thus making sliding a bit of a hassle. Not bad enough to change tho.