I used to have State Farm. They were very good to me ... until the divorce. They had my hands tied for over a year paying my Ex's auto insurance. The only way I was able to get out of it was to go delinquent on payments. UGLY.
I now have USAA and love it. That won't help most of you because you have to have ties to the military to get it.
Back on track with the thread: I never had any experience with cheap aftermarket parts but have been forced into used parts on an insurance repair. It all worked out but just "seemed wrong".