Got to see this on Thursday. It’s really incredibly good fun, and has all the spirit of the older movies. Plus it has aliens and references to the last movies and a sequence involving fire ants and Indy’s son (played by Shia LaBeouf, who I will always think of as the kid from Holes no matter how big a star he gets) and Cate Blanchett making a really good villain.
Furthermore, it has Neil Flynn, also known as The Janitor, in a minor role. The whole cinema broke into excited whispering when we realised it was him. :D
In conclusion: go and see it. :D