I have Racedeck in my garage. I placed it over a self-installed epoxy coating which I wasn't happy with. I think a professionally applied epoxy floor is the ultimate in looks, ease of maintenance and cost (high). Racedeck is economical and good looking. I was aware of the clicking sound before I purchased the Racedeck, but I don't even think about it anymore. Bottom line: I couldn't be happier with my decision. I have a pretty large garage (36 X 36) so epoxy would have cost a fortune. Racedeck also allowed me to design a checkerboard pattern around the perimeter to add some style to the expanse. Remember, this stuff is plastic so you have to use a wood plank under jacks and jack stands to prevent permanent marks. Another consideration is that the Racedeck floor "floats" on the base floor and in a large, unheated/uncooled garage like mine the floor can bunch up slightly in the summer when its expansion is constrained by parked cars. These are very small issues and I would buy another Racedeck floor without hesitation, as I probably will for a forthcoming Florida garage.
Howard