I've had a couple different mats before this one for my home office. The first one cracked apart after a year or so and the other wouldn't stay in place. So far this one stays in place and seems to be resilient enough to not crack.
The plastic sinks in when you sit in the chair for a while so it makes it so the chair does not roll easily which is the reason we bought the mat for:( No we are not big fat people!