I watched this film as part of catching up on the series after seeing number 4 at the cinema and I was not looking forward to it as I had watched it before and been unimpressed with it. I wonder if going in with such low expectations helped when watching this as I actually quite liked it, there is a lot going on and it is about 30 minutes too long. The story throughout still follows the love story of Keira Knightly and Orlando Bloom and you have Johnny Depp escaping and surviving throughout as Captain Jack Sparrow.
You have Bill Nighy and Geoffrey Rush back as their characters and you have all of the rest of the cast coming back again. Overall it is not a bad film but it is fairly hard work and the ending is sort of a mixed based on the fact that it is a Disney film.
I think this is 3 stars for me, it is not watchable without having seen parts 1 and 2 and you should only watch this if you have endured the 2nd part.