I bought this because two other family members have the same type of mat on the same time of carpet as me. I have owned it less than a week and I have had it slide on me over 20 times even though I have a heavy desk on top of it. I guess one side of my heavy desk is not heavy enough. I am weary of always moving it back into place. I should have bought a mat with spikes. By the way this was not shipped in a box. It had a delivery sticker on a flat plastic mat. Easy to remove the sticker with no residue at least.
When chair slides off the edge of the mat and catches on edge it Won’t roll back to the mat. Must stand in and put it back. Also chair doesn’t glide on the mat.
I have done reviews and surveys already. I have only 1 purchase; if you keep after me for reviews and surveys repeatedly this will be my first and last purchase. Enough already.