Not a USAA member.
That being said, I only care about one thing when it comes to insurance companies -- how do they handle claims.
Auto: We have had three cars totaled in 20 years -- the county dropped an electrical pole on one; one was stolen off our driveway; one destroyed in a flood. Our rates are lower than when we started. And it's a mutual. If Pele opens a lava tube under my car, I'm not worried.
In addition, I use this company for my umbrella policy.
Property insurance is the same story. I've had a big claim thanks to an awful tenant. Damage fixed. Lost rent reimbursed. No rate increase.
If another company offered me big savings, I'd laugh at them.
I have been a USAA member since 1971. For me, how USAA handled claims has been extremely outstanding. Fifteen years ago our home was struck by lightning and resulting fire. A claims adjuster was on site within 48 hours, arranged for temporary housing, met with a company we chose for handling clean up and rebuild. Within days we had an agreement to begin rebuild. The adjuster had over $100K wired to my bank account to cover expenses as they occurred for living expenses and rebuild. They were fantastic.
And in the last five years, we have had 4 vehicles totaled. Two by collision with deer, one was rear ended, and our camper damaged by a hail storm while traveling in Colorado. All acts of nature except the rear ending. We tried to work with the other insurance company GEICO, but found USAA was much more responsive and USAA sent a check for replacement within weeks, a couple of months later sent us the deductible once they settled with GEico.
It is very hard to compare USAA rates with other companies as they maintain a Subscriber Savings Account that essentially results in a rebate of premiums depending on their loss experience for the year. If I ever leave them for over six moths, the balance is sent. And the last several years, I get about a $600 yearly rebate of premiums,
I have found their investment services ( mostly now sold off) and their banking services are not anything special and have done much better by ignoring those branch services through the years.