It did take some time to unroll and flatten. I did have to get creative on putting stuff on top of it to Help get it flat. The grooves on the underside could be deeper. The mat does move across my rug and I have to keep putting it back. so far I am already seeing little dents from sitting in my chair. I do like the size. I did think it was going to be a little bit thicker since it was advertised for gaming and people who sit at computers do sit there for a very long time.

Works well. Took a few hours to flatten out using heavy boxes, then it was good to go!

Terrible piece of plastic that curls up

We have followed the instructions for the last 4 days to get this Mat flat. We have used the hair dryer, set it out in the sun, put a lot of weight on it and it still rolls right back up. This mat does not have ANY anti-slip properties. Be cautious with use!!!

Not as hard as I would have expected. The office chair's wheels embed themselves into this malleable plastic material.