We have the mat under a desk and part of it had to be slid under our bookshelf. It sometimes "bubbles up" on the corner. Quality is good for the price. The plastic seems very pliable. Our older one seemed a little more stiff but I don't know if that is better or not. It cracked after about six years of use (which is very good in my opinion.) Perhaps the pliability of this one will make it a better mat. I really can't say but I'll be happy if it also lasts five or six years.
It stays in securely in place. I like the mat but the chair wheels leaves little indentations in the mat. It does seem to smooth back out after awhile.
The delivery was on right on time and price was good. As some mentioned the mat does tend to move forward on the carpet. So know you will need to slide back into place from time to time. Overall a good purchase for the amount we paid!