The best thing about this film is the way it allows the songs to shine - a reminder of the Beatles' true greatness.
The second best thing is the concept - what if the Beatles were erased from history instantaneously and no one had any memory of them other than one extremely struggling singer songwriter?
Maybe Yesterday should have done more with those two elements but even as it is, and even with some problematic bits (especially the romance), it's a feel good film ultimately just as it aspires to be.