If you look at Net Promoter Score (how likely a customer is to recommend a business to a friend, family member or colleague,) USAA wins in both home and auto and it is not even close.
I have been a member since I was 16 years old. When my wife moved in with me (prior to our engagement and marriage,) we were able to add her as a cohabitant. Every single claim I have had (admittedly, not too many over the last 26 plus years) has been paid within days and without hassle.
Unless something radically changes in the future, I don't even plan to shop them. I am willing to pay for the level of service they provide me, including banking services (which are free.)
Oh, and they insure my guns too...
All the God's, all the Heavens, all the Hells are within you.