I bought three of these for the office during a 20% off promotion. They're pretty basic. Other options are surprisingly more expensive. It does gas-off a plastic smell for a few days.
+200 lb guy siting on a wheeled chair makes the wheels sink in a little bit and hard to start moving but once I am going it rolls fine. I think if it were a little thicker it would help stand up. Also was very dirty when I got it delivered. I had to clean it 2-3 times before the papertowel came back clean. Forget trying to clean the bottom spikes make that impossible. Maybe with a hose outside but its winter now... dirt was mostly dust and grit. Looked like someone had dragged it through a dessert before puting it on the truck. icecream and chocolate sauce everywhere.
It's actually smaller than I had before and while I keep and use this one I will be sure next year to order the larger version. These last me just about a year before they start cracking.