Avengers: Infinity War, writes The Guardian's reviewer, is an "utterly confident comic-book movie mash-up."
Total Film concurs, describing it as "an onslaught of action, thrills, gags and gasps" in its own five-star review.
Yet Digital Spy expresses reservations in its three-star write-up, saying "it all feels a bit rushed" and is "ultimately rather depressing".
The Telegraph's Tim Robey, meanwhile, finds fault with Josh Brolin's Thanos, suggesting he resembles an "outsize ogre-thug beamed in from World of Warcraft".
