I am using this in my office over carpet. The product is too light weight and pliable. Consequently the chair rollers form indentations in the mat making it difficult to move the chair.
After reading all the reviews and searches online I finally purchased this chairmat. It does slide on my floor kinda expected. The only minor complain is that the stickers and labels on the product is too strong it left a lot of sticky residue on it.
I have a rug on a laminate floor and this mat has to bridge both - so not really ideal. However I've had to attach to the hardwood floor with 2 sided tape to stop moving and the chair casters make quite big dents in mat (over the rug). The dents do straighten out somewhat when the chair is pushed under the desk (over the laminate) at night. Time will tell how long it might last. Probably works fine if used just on a hardwood floor.
I purchased this particular mat because it seemed to me that it was a good deal and the others were a bit on the expensive side. Well I learned my lesson! It hasn't even been a year and this one is literally falling apart and looks worse than the one it replaced (which was here in the office long before I was).