Mimi's is a clean, solid diner with food that delivers what you expect without pulling any crazy punches.  While it has been reincarnated several times over, I wouldn't call what it retained particularly charm.  The atmosphere is friendly  but quiet with no music playing.  If you want a fried chicken breast that is not greasy, a good stop.
Review Source:Tired or Retired:
Mimi's is an old school hash-slinging palace. They have eggs, bacon, biscuits, chicken-fried steak, patty melts, etc.
Better like eating early, because as soon as the lunch rush slows down, the tired elderly waitresses, head out, and Mimi's shuts down by 2.
Nothing remarkable, but nothing dangerous either. Safe Breakfast standards. Not an unpleasant choice.