[rsavage]

I used race deck flooring. I bought the open pattern so that fluids could eventually migrate to my center drain (they have channels on the bottom). I have pulled and installed engines and drive trains with no ill effects. They are not slippery UNLESS you step on a wrench you left lying on the floor or another loose tile on top of one as you install - you will go for a ride. So far (couple of years and lots of hard use) it has held up well. I use a shop vac to vacuum out the nooks and crannies. Cleans up easily with soap and warm water. Can even use brake cleaner on them if necessary. Not cheap, but I can snap them up and reinstall if I choose to or want to clean the concrete, and I can take them with me if I were to move. Easy quick install. I did my garage (36' X 26') in a day.