I had recently bought the Martha Stewart simple desk and fabric chair and realized it was too hard to move the chair in order to sit at the desk. I also didn't want the chair to push permanent holes into my carpet. I was afraid I'd stub my toe on the mat but it lays perfectly flat and hasn't given me a problem at all. I had expected to have to put $40 to $50 into such a mat but it was less than $20! You can't beat that value and even though it isn't the highest quality available it works perfectly fine!
I bought 2 of these floor mats for 2 offices with hardwood floors. They work great! They were delivered "as is" (no packaging) and were rolled up. The curl came out virtually immediately and they lay flat within a few hours. They are easy on the floor and the chairs roll or slide easily on them without any slippage. There was a slight smell to them initially but within a short time the odor was gone. These chair mats work very well to protect our hardwood flooring and allow the easy chair manueverability needed.
This product comes folded from the factory. It took several weeks and weights before product flattened enough to use. There are still ripples which prevent mat from hugging carpet.
I've bought this in the past when it had the spike like cleats and it lasted for over 5 years of heavy use. This new cleat design gentler on hands. Make sure that when you buy one it is slightly pliable (new stock) and use it as it states on a flat pile rug like a commercial type. Older stock is already hardening and will crack and not last as long. Office temperature sun light exposure are other factors in durability. Great product at a great price!