I've had State Farm for better than 15 years now, in 2 states. Absolutely no complaints about them.
Allstate, OTOH... ... I was in a fender bender with an Allstate insured driver 10 years ago (his fault, he got the ticket to prove it. ) Absolutely miserable company to deal with from my perspective. Weren't interested in seeing my Jeep, and made several more mistakes along the way. Enough, in fact, that I went back through State Farm, paid my deductible (got it back eventually through subrogation,) and got my Jeep back before Allstate could get me in to one of their adjusters.