This Spot Bot machine works pretty well for cleaning up cat barf (we have a lot of cats). The machine is fine. My only gripe is the conflicting instructions for adding detergent and boost. The instructions on the machine say to add a whole bunch more detergent than the instructions on the detergent bottles. Although the machine instructions are anything but clear, it appears one is supposed to add about one ounce of Pet Stain detergent per eight ounces of water. Plus an ounce of Boost. However, the instructions on the side of the Pet Stain detergent bottle say to add either 2.5 ounces per gallon of water, or 5 ounces per gallon of water. Well, 5 ounces detergent per gallon of water is much different than 1 ounce detergent per eight ounces of water. After all, there are 16 cups in a gallon. So which is it? Does a gallon of water take 2.5 ounces of detergent, or 5 ounces of detergent, or 16 ounces of detergent?