Agree with PP - so easy, no pressure.
We had a USAA car loan ready to go and the whole process took no time at all. We bought two cars from them, and have also sold two. So worth it for the time saved, even if we probably could have worked for better deals somewhere else for both the buying and selling.
Although, then I bought a car using the USAA car buying service - it sent us to a local dealership, car was ready to go for a terrific price. I'll do that again for the next car.