I felt that the method by which they were shipped was very poor. They were warped and bent out of shape. It took some time just to get them reasonably flat. Previous shipments where much better
Mat itself was everything I could have hoped for My only complaint is that it was delivered in such a state that it actually took 2 days to straighten out enough to use.
Didn't like the softness of the plastic. Used on rug wheels from chair would sink in a bit leaving an indentation. Also not very easy for chair to slide over possibly because lack of hardness in plastic. Maybe best used on industrial type rug or carpet.
Our office is carpeted with pretty heavy carpet with pad and it is difficult to get a pad that stays "smooth without dips". This pad is doing very well a little dimple under the chair wheels but I have no problems! I like it!!