So far for me most of my bounty campaign was a success and i'm selecting those campaigns in ICO Bench. But of course not hi ratings ICO's are perfect but at least choose wisely with a better team, working product or Apps etc.
Those ratings at the ICO Bench is not a guarantee that the project is good because they can be paid though there are some projects with high rating that were also successful. My suggestion is to make your own research on the project carefully so not to waste your time.