Anton Volkov’s review published on Letterboxd:
They really went and did it. Did not feel like 3 hours at all, what a brilliantly executed finale that really is blockbuster filmmaking with a capital B. Films like The Winter Soldier, Logan and Nolan's Batman trilogy can be argued to be shy of their comic book roots and attempt to be above it. Endgame's biggest achievement is managing to have it both ways, and throw in well-placed fan service capping 11 years off on top. There is only one aspect that I'm currently unsure about that I'll have to reassess on rewatch, won't give it away here... And really - just see it first, before anything else...bring on tomorrow back to back with Infinity War.
P.S. Rankings at the moment: best MCU film? My personal feeling is TWS and IM3 may just top it but that's just personal preference. Better than IW? Different beast, in fact ENDGAME is making me appreciate the earlier film's slightly more experimental approach.