I've used it a few years ago - came as part of the display for a MazdaSpeed vehicle launch. Our pad was about 20' by 20'. It's really easy to put together - pretty much just clicks - I think it took two of us an hour to get all the tiles together with the ramp trim. The tiles are about 3/8 - 1/2 in. thick, and pretty durable.
Keep in mind there are joints between the tiles, so if a liquid drops on them, it will go below them. You could use a plastic liner of some sort, but I think you start running into more trouble than its worth in a hurry.
The surface isn't strong enough to work on either. I wouldn't jack a car up on them, and as above, if you were to spill oil, or some other fluid while working you'd have a huge mess.
If you're doing a show-space only, you're probably OK. If the space is show + work I personally would choose a good heavy duty epoxy first. There are a bunch of solutions online if you dig around.