The map is fine . The delivery was the worst I have ever seen it was dropped off a mile away on the road next to our mailbox the lady that I told this to was very helpfull and listened to my story and said she will pass theinfo on strongly suggest that delivery co. Should be off your list.
I've tried different chair mats before on my carpet but they always start pulling up on the sides making it easy to trip over. I've had this mat for about a month and have not had a single issue with it. It's easy to roll over with my chair but does sometimes budge every now and then.