Well, it didn't live up to "Colonel Homer," but it was better than "Smoke on the Daughter." So, I liked it.
The plot moved at a fairly surprising pace; I thought they'd spend more time on Marge generally hating Lurleen. The story seemed to work anyway. Lurleen's dad is a real piece of work. And there were songs, too! Yes, songs... Speaking of which, I'm not a fan of country music, but the Dixie Chicks were actually pretty funny.
Anyway, my favorite part was the last line of the show. As soon as I read the initial press release, I hoped they'd do something like that.

Aaaand cue Kenneth completely misinterpreting the Dixie Chicks' song in 5, 4, 3, 2...