This mat is perfect to protect tile floors. The chair wheels don't get caught in the grout area between the tiles. It comes rolled up and they give instructions on how to flatten it out. All worked fine.
It does exactly what I need it to. No spikes on the bottom which is great. It might arrive slightly warped or rolled but it fFlattens out quickly with no problems.
Created a temporary office in my guest room and saw that my desk chair was going to damage the wooden floor. This mat seemed to be the best deal and Staples had plenty in stock. It works really well had minimum curling issues and as an unexpected benefit actually looks great in the space! I would definitely recommend this to others!