The purchase on the whole was Great except I had purchased the same Mat about 4 years ago. When I purchased it then it came rolled up as wrapped in "shrink wrap" in 2 places around the outside. This one was not wrapped which made it somewhat difficult to handle. That's probably why they charge you a service charge for special handling.
I used this for several months on a newly finished Oak floor. When I moved the mat there was damage to the floor anyway. There were scuff marks around the edges of the mat. A better solution is to buy new casters (wheels) for your chair. You will want softer wheels - that do not mark up hardwood floors.