Having read other reviews ,decided to go for this mat,sceptical at first,but have to say ,is Excellent ,would say quite pricey,but guess one has to pay for quality.
Having 80g very deep pile carpet...the mat grips well and the 5 castor heavy duty office chair,just glides effortlessly ,just a bit too smooth if anything.
Item is well finished with nicely bevelled edges,and was well packaged.
Overall would definitely recommend as was impossible without this.
Wearability ...well only time will tell,but should be fine.
Update 25 Jan 2013 ..
A year on ,the mat used for some 4- 6 hrs a day and have to say the mat is good as new from day one.No damage, grips well on carpet and no movement.
So have now upped the rating to 5 star ...think this has got to be the best chair mat on the market.