I am / was a member, it did get me 1 large job . The company I got the job from was also Safe contractor so they wanted to use a Safe Contractor window cleaner.
I did have a few problems with SC , so I have not renewed my membership. If you dont want to renew it you have to give them 1 months notice before your renewal date , otherwise they send you nasty little emails telling you they are puting your debt in the hands of a debt collection agency and will take you to court for not paying your renewal