A 5 caster chair even when empty overnight leaves indents and then won't roll easily. Mat needs to be of a harder material. I have had one in the past and did not do this.
I picked this one for my sewing chair but evidently my carpet has a higher pile and the chair does not move easily. Most likely I will have to purchase another mat that has a more rigid plastic base to make the movement possible.
…for under my desk to give the most coverage. The chair mat is a tad bit softer than I anticipated and sunk in under the rollers of my chair however I would take this over a mat that is really stiff as that cracks readily.
Bought it for my wife to put under her chair while she works at her sowing machine. Just today she told me the edge sticks up (presumably from the weight of her sitting on her chair) and one time not realizing the edge was sticking up she caught her toe on it (ouch). Shudda paid more for the better one.