The best prison movie of 2017, or... You'll Believe a Bear Can Cry

I went to this movie with a mindset of pure hate, intending to mock it relentlessly here, demonstrating my sophistication and dark, wry, humor.  But I'm afraid that will be impossible.  This is a very fine movie, fully deserving its 100% rating (184 reviews) on Rotten Tomatoes.  It's Metacritic score of 88 is, if anything, a bit stingy.

Key points:

• This is a nice movie for nice people.  It pitches the idea that there is a little good in all of us, and keeps pitching it, and then pitches it some more.  I mean, they just will not shut up about it.
• It is beautiful throughout, with visual interludes so dynamic and creative they took my breath away.  Cinematographer Erik Wilson crushed this.  I will be on the lookout for other films filmed by Erik Wilson.
• Hugh Grant, whom I've hated in everything I've seen him in, plays an evil washed-up actor and completely redeems himself.
• Several fine dance numbers.
• Celebrates diversity.
• Makes you miss London.  Make you wonder why the world can't be a tolerant loving family place like London.  Makes you wonder why we can't all find just a little more love in our hearts and have the whole world be more like London.
• Double plus good prison scenes, including the best escape scene since Papillon. 
• Encourages us to be kind to immigrants.
• Best train fight scene since Skyfall.
• Knuckles McGinty:

Full TVTropes assessment here.