I haven't seen any of the other films Robert Duvall has written or directed. There aren't many of them and there's possibly a very good reason for this. The man is a very fine actor, no one could deny that, but perhaps writing and directing are simply not for him if 'Wild Horses' is anything to go by. The script in particular is an absolute mess. The dialogue often feels like it's been written for a 5 year-old and by a 5 year-old. The story is told in incredibly clunky fashion and none of the intended 'heavy' scenes have any effect whatsoever on the audience.
The directing is not much better. The actors all look completely lost in every scene. There's some very strange casting with the likes of Josh Hartnett and James Franco, but the strangest of all was Luciana Pedraza. She was so unbelievably bad in her performance I had to look up her IMDb profile just to see who exactly the hell she was - only to find she was in fact Duvall's sister-in-law, sigh! I can't imagine any other filmmaker being willing to cast her and yet I notice Duvall also cast her in his 2002 film 'Assasination Tango'. Perhaps he just makes a film every ten years or so with a role written specifically for her so she can pay some bills. Who knows, but it's really not a good look. An awful performance in an awful film. Nothing to see here.