If you get Willie Nelson (I guess everyone does...). If you do, then this is Willie - effortlessly. Playing straight man to Willie takes a little something. Slim Pickens in Honeysuckle Rose, Gary Busey in Barbarossa - master character actors. Kris is up to the job. The writing is redeemed by personality. Willie and Kris are actors enjoying themselves. And for actors, they aren't bad musicians.
