We own a small handyman business and have been purchasing from Armorgarage for many years, probably 50+ orders. Their products are absolutely superb and their customer service is excellent. If you follow their instructions you won't have a problem. Some of the other complaints noted here seem to be from people who didn't prep properly, or had other conditions with their surfaces that caused problems. No coating is a fix-all for problematic floors.
We also find that the amount they give for the square footage is always more than is needed, or less, so anyone that ran short had a porous or irregular floor, or applied it incorrectly.