I liked it a lot. Sweet, emotional, simple, complex and left me yearning for some Powdermilk Biscuits.
Both IMDB and Wikipedia note in their trivia for the movie that Paul Thomas Anderson was on set at all times observing so he could take over from Robert Altman in case he fell ill or died. I wonder if Anderson has wrote anything on that experience.
Update: Apparently Rex from Fimoculous was reporting that Anderson essentially directed the film while an infirm Altman drifted in and out of consciousness. I’m taking this with a grain of salt as Rex and Garrison Keillor have a history of not getting along.