The interlocking sqaures are expensive, but man do they look cool! I wanted to get them but my budget wouldnt allow. I ended up using 2 part epoxy on my floor instead and I am quite happy with the results, and it cost a fraction of the interlocking tiles. But the epoxy required quite a bit of work to clean/prep the concrete before application.
The coin design mats are cool too, but do you glue them down or something, or just roll em out?.. just wondering.