Quite entertaining despite all the bad reviews. Critics are just tired of Jack Sparrow I think. They are not tired of Fast and Furious movies though ?
The movie is fun and better than the 4th one. Kaya Scodelario makes a good addition as Carina Smyth. Who gets either confused as a witch or...a whore because she's a horologist lol. There's plenty of humor like that throughout that makes this one of the better Pirates movies.
While Javier Bardem once again makes a great villain as Captain Salazar. Who from the trailers you probably figured out, is a spirit wants vengeance on Jack Sparrow.
Otherwise stuff, like the search for Poseidon's Trident is as silly as the search for the fountain of youth in the last film. Also don't expect too much Orlando Bloom but it's nice to see him back nevertheless.
If this is the last one I wouldn't complain since it's a fitting ending.