This mat was a little more expensive than my previous one but it's much more firm and larger so I don't find my chair getting stuck halfway off/on the mat. It is very sturdy and makes it feel like I am on a hard floor. I'd recommend spending a few extra bucks for this mat. I can tell it will hold up for years.
Unfortunately when sitting in the chair on the mat the wheels dig deeply into the mat so it's difficult to maneuver the chair around and creat a new spot.