I, too, am just about to do this. I have been researching concrete sealer and coating products for weeks, and had pretty much decided to use Euco's Diamond Hard, or their equivalent product Ultrasil Li+ when I found this thread today.
I don't know what Ultrasil costs, but it will be more, as it is simply an apply and walk away product, that I am told, is otherwise identical to Diamond Hard. My floor is 36'x48', so grinding and epoxy are just priced out of my world. Stain resistance and ease of cleanup are my main concern, and this product will do that at a price that I can live with.
I would also like to see an update from one of the guys who put this product on their concrete back in 2009, but with a product life of something like 20 years, I would think they are still pleased with it.