I watched that movie by accident several years back by accident - channel surfing, and I saw Robert Duvall and figured it was probably worth watching.
It was. Aside from the performances by Duvall and Caine (two actors that, frankly, I'd never have pictured together who did turned in absolutely stellar performances) it was something else to see a depiction of Texas and an era that was gone before my time but which I remember seeing in bits and pieces that still linger out in parts of the Hill Country. Recognizing a couple of the shooting locales was something else - I used to visit the Perry mansion all the time as a kid.
To have men like that for mentors. We should all be so fortunate.
Overall, one of those movies you keep around and watch a couple of times a year just because.