I was mandated to get a chair mat by my apartment leasing agency during Covid due to all of the people working from home (not me, sadly).  I wanted something visually unobtrusive that would fit my smaller desk.
This mat has exceeded all of my expectations - it's a good size, fits under my small desk, tolerates a medium+ pile carpet, is super easy to clean, doesn't warp or scuff, blends into the surroundings because it's clear, and is a lovely heat sink in the summer (i don't have AC).  I was not expecting to like this nearly as much as I do.  I dread moving it to another apartment, but otherwise am very pleased