This will be the simplest review I’ve written in quite a long time. or, at least, the simplest positive review. Because, you see, Paul was brought to you, as they say, by the creators and stars of Shaun of the Dead and Hot Fuzz. And what they did with the zombie and the buddy cop premises respectively, they have done with the alien premise here: and that is to look at it from all[1] of its various extant Hollywood iterations, and then send them up in right proper hilarious fashion, with digressions toward both the black helicopter set and the competition[2] between the theories of evolution and intelligent design.
My point is that if you’ve seen some combination of the other two movies, you already know how you’ll feel about Paul; and if you haven’t, damn, get on with it already! They’re easy to find, yo.
[1] For inevitably small literal values of all, but they do what they can.
[2] I’ve said before that sometimes the jokes are written just for myself? This is an example of that. Heh heh.