Experiences with submit services like Submit Bro

Hey, does anyone have experiences with services that submit your products to directories, like Submit Bro? It seems like a very straightforward service to use as it's quite tedious to go through all these very similar forms. However, I've used one in the past and it was really useless, of the hundred or so submissions they said they made, I could only see one or two actually show up. (That wasn't with "Submit Bro", just mentioning them because they came up somewhere). Is there any out there people have good experiences with OR that offers money back if they don't get results?