This movie is basically a road movie, with newly retired farmer Hop and his millennial granddaughter hitting the road in his rusty Winnebago. They don't really have much in common, so the road between them is as long as the road they plan to take from Minnesota to California.
The movie is well acted, with some Hollywood veterans leavened by a number of marvelous actors from Minnesota's thriving theater scene. The script employed a lot of overused tropes (old people's deafness, old people's unfamiliarity with tech, lying on dating apps, etc.), but they nevertheless mostly worked pretty well, and that's what counts.
On the negative side, the stretch of the movie before the leads actually hit the road didn't work too well for me. A bit pokey, a bit schematic, a bit two dimensional, a bit stale. They should have revved up the motor sooner.
Finally, the title. Ugh. The title has already killed bigger movies than this one (Richard Gere, 1987). Since the movie is set in the town of 'Sleepy Eye', use that in the title instead: 'King of Sleepy Eye' or 'Sleepy Eye, Population 245' or whatever. ANYTHING else.