This is an ok mat. Serves it's purpose and is the perfect size. Not real fond of the way the chair wheels "sink" down into the plastic making for a slight aggravation to move but the mat does slowly recover and does not stay dented.
This mat is good but it came shipped without any packaging. Consequently it was difficult to handle after it was delivered and it inflicted minor wounds on me as I tried to move it to my apartment. All it needs is some tape or twine to keep it in a loosely rolled-up shape with the spikes on the interior of the roll. I like the product but beware of the spikes if it is not rolled with them on the interior!