The only way to go for high-pile carpets. Don't bother with any of the others as they will crack and deteriorate in only months. This is the second one I have purchased (need two for the office) and the first one still looks like it did new after 1 1/2 years. Although it moves slightly on carpet I feel you will get that somewhat so that is not a deal breaker. They are expensive but less expensive than replacing lesser pads all the time.
I got this mat for free; it was offered on a promotional deal with the purchase of select chairs. I would have paid for it anyway because it is exactly what I was looking for! It fits perfectly within my working space stays in place and the chair doesn't "catch" on it even if I roll it off of the mat sometimes. Also it didn't need to lay flat for a day or two like the description states: it was fine right after I put it down - though that might not be the case for all of them. Overall I am very pleased with it and will probably be purchasing 2 more soon - one for my spouse and one for my daughter.