This may come across as bitter, if it does, my apologies. The intent is friendly conversation, albiet long for the question asked.
The first accident I had, USAA tried to get me to admit blame for both hitting the car in front of me, and in an even more douchey move, for being hit at all. I didn't have any dash cam footage to back me up when I repeatedly said she was going at least 55 MPH and no brake lights were to be seen. If I had, there may be a reckless endangerment case against the driver behind me considering how long she had to stop -- in a 45 MPH speed limit zone, personally tested, there's a full 3.5 second gap from my position being first visible to impact, at a steady rate of 60 MPH. She said she was going 35 MPH, which would make it a roughly 6-second gap. I don't care how they try to spin it, that's distracted driving bare minimum, and she was cited for a 1-point "following too closely" violation.
This time around, considering there are no witnesses that stayed around, I'm quite happy to have my dash cam be the reliable stand-in. Never know what the other party would say to get out of it, but working at an insurance company myself (well, not anymore as of earlier this month -- IT department got split into our own company, but we're still next door), I've really heard a wide variety of crap people pull.
USAA is good to their own members from everything I've heard, but they can and DO screw you over if you're not with them and you let them take advantage of you. I have lots of issues with how they handled that claim, and have sworn to always recommend against them as a result.