Matt Curione’s review published on Letterboxd:
A tremendous love letter to days gone by, an enthralling hangout movie, a great film about friendship, and a superb addition to one of my favorite sub-genres (movies about movies), Tarantino's latest is also one of the best of the year.
Completely blown away by the scope and craft of it all, this is something special. With a cast at the top of their game, there's almost never a dull moment. Every scene is vital, adding to the story at hand, never once coming across as indulgent or unnecessary. Gorgeous to look at and just a wonder to behold, Once Upon a Time is both hilarious and terrifying in equal measure.
You're constantly waiting for the other shoe to drop and it leads up to an intense finale with all the Tarantino quirks and flourishes you could ask for. It can be a great thing when a celebrated filmmaker comes into his own, and Once Upon a Time ...in Hollywood is a shining example of that.