I bought this to replace a mat that was beginning to crack after approximately five years of use. This man is softer than others I have had which is actually a good thing. It took less than four hours for the mat to settle down and become flat after I put it on my carpet. Although the rollers of my home office desk chair make indentations in the mat because the mat is softer these are very easy to roll out of. My previous mat was stiffer and I actually had to lift the chair out of the indentations to move it. Based on the two weeks I have used it I would buy this mat again.
I replaced a hard mat and am a little disappointed because the chair makes indentations on the mat and is not as easy to move around. I would have preferred a hard mat.