Finished U4, and the finale is quite good! Minor spoilers below.
SPOILERI didn't like the boss fight, but unlike the frustratingly bad ones from U1 or U2, it was because it was a little underwhelming. The story climax was definitely fistpump worthy. Epilogue a little meh, though I definitely enjoyed giving a dog a second treat.
― Nag Reddit (Leee), Monday, 24 September 2018 21:27 (two years ago) link