Hi guys,
I am glad I asked now, since I seem to have company in my inability to decide.
Here is my deal:
About 3 years ago in NC, I built a small 22X26 garage with a concrete floor. I used the Rustoleum epoxy-shield stuff with excellent results. I was very careful with my prep work and when I sold the house a few months ago, the floor was still perfect. I found the epoxy to be very resistant to my clumsiness. It withstood hottt tires, oil, antifreeze, brake fluid, tool drops, transmission drops, sliding work benches, ***** (just checking to see if you are awake), diesel etc. I did use two coats because I thought the first coat was way to thin. After the second coat, the floor appearance greatly improved.
My floor in NC had a "rough" surface. My new (to me) floor in Montana, has a very smooth surface, but has never had a sealer. I thought I may use a higher quality product this time to get a thicker coat on the first application.
I think I may try the stuff from the link in my first post if no one knows of any serious issues with it. I believe even the cheap home depot stuff will last a long time if the floor is adequately prepared.