For me, most of these sites give information about the team, the project and contact details. Using this information you can analyze yourself and don't need any expert opinions.
Trust ICOs Rating sites that are rated on ICOS campaigns are about to run i believe in it. Because of that investors have an overview of ICOS campaigns before investing. And i think this is a good thing for our community. But lately there are some negative information about this indicator that i do not know much about.