What are you using it for?
If you're thinking of soldering on it, do you really need the ESD?
I put the board in a vise, so I'd rather have a mat that can handle the soldering. The vise can be grounded through a wrist strap or large value resistor. I keep parts on a separate ESD mat, but sensitive parts stay in conductive foam, too, 'cause I'm the biggest static problem. The circuit board can be grounded the same way using alligator clips, probably attached to the ground plane.
Trying to find something advertised to handle both soldering temperatures and ESD is expensive and noone really talks actual temperatures. One "high temperature" ESD mat only handles 160C. A lot of PVC (which that guy you link to is) melts just above there. A blob of solder would go through that like Alien's blood.
Which reminds me... is it chemically resistant, too? Something else to maybe think about.
