This sheet of plastic is a waste of money, big time. We bought it to fit the three man Eureka tent and it only just covered half the floor. We have since found out that we ordered the small floor saver as there was no option given to buy the medium on the web site. After a test setup on grass it had holes in it and no it doesn't have grommets in the corners. I could have bought better from the hardware for a lot less. I wish I had read the reviews before I bought it. I can only think that the product must have changed if people gave good reviews. There is no way known that it could get a good review.