I purchased a medium pile carpet chair mat to use on carpet by my computer. This is the second one I purchased. It doesn't shift chair rolls smoothly and I love it!
does show chair wheel indentations but does not yet seem to hinder chair rolling easy to roll back on to mat if you roll off. generally pretty satisfied. would recommend.
So far so good. No signs of cracking or splitting. My stepson spends many waking hours in that chair at his computer. Other mats have cracked within several weeks. I'm hoping this is the one we needed all along.
This is a great chair mat. It came rolled up but flattened out very quickly. I have medium deep carpeting in my home office and it works great with that pile. I purchased this size as I wanted enough room for my chair to move around and it satisfies that need very well. It is just too wide for my desk! LOL But that's OK it spans the front of my desk and the lip provides me with a place to rest my feet. I recommend this mat just measure the width of your desk first! :-)