Hoody, we've been using it, still on our first 6 lb pail. From what I've gotten
Jon Don to tell me, it is a pretty much a copy of OSR. They may have tinkered a little bit here and there and set it up as a booster as well as a tile and grout cleaner, but it does work fairly well with urine smell and stain as long as you flush the majority of it out. Its made me a hero several times already with half of the work that
Matrix bottom line is and better smelling as well. I found it works absolutly the best when you use an open solutino line from the TM. Needs atleast 150 degrees to make the stuff happy and foamy.