It's exactly what I needed so my chair could move easily on a carpeted floor. [...] It is a replacement for another chairmat that I got from Staples over 14 years ago! Very satisfied!
Put this down under an office chair (with casters) to protect an old pine floor. The mat moves around a little but not so much that the chair rolls off. I'm not sure if the lip adds any value; maybe it'd protect the floor from hard or dirty shoes? Seems like decent construction I'm not worried about it cracking or anything. This is about the smallest size I'd be willing to go. Would definitely buy again.