I've got a epoxy floor quartz sand coating on my garage floor that looks similar to the one pictured but a different color. It was done in 2006 and other than the glossiness heading towards more of a satin look....it looks like the day it was installed. I didn't take any chances on my handyman skills and had it professionally done.
I'm actually happier with it since it's now not so shiny and showing every speck of dirt.
My home builder buggered up the concrete floor in the garage so it drained inward and had cracks galore. They had to bust it up and re-pour it and did a poor job again with spalling etc but at least the direction of flow was outside of the house. I had the floor done to alleviate the shoemaker job that the builders concrete guys did. Otherwise I probably wouldn't have spent the money.
The floor has excellent grip, not slippery at all, but the big downside for me is that the pad no longer absorbs water/snow/ice etc off the vehicles in the garage. During the winter I'm always squeegeeing out the floor of standing shmeggy winter mess. In my old garage it was just absorbed into the concrete....I'm sure salt water isn't great for concrete over the long haul though.
