I have purchased the urine out large area kit. I have two cats and 2 dogs. My dogs have accidents sometimes and the system works well. My bedroom floor is dark from cats. It takes a process and several tries. But it is coming out. I have one issue, the kit I bought does not give you enough step I or the powder. Therefore I have bought more. Overall it works really well, it just takes time to get it all out if it is bad. Thanks