I saw it yesterday and it's a great film. Everyone I know who's seen it has enjoyed it.
I had seen the articles about it not making money, which is a problem, but not necessarily a reflection of the film itself.
I was surprised reviewers were treating it so harshly. I absolutely have issues with the film but it's still a solid movie. I definitely left the theater with interesting things to think about.
I'm reminded of the recent film "The Drama". The summary of that film is "A happily-engaged couple is put to the test when an unexpected turn sends their wedding week off the rails." If you've seen the film, sure... Technically that's true. But the film is about A LOT of other things that are much more interesting. (I don't want to spoil more, but it's an excellent film but as fair warning it deals with heavy issues.)
I think "Digger" is like that. The trailer and summary pitch a simple plot, "The most powerful man in the world embarks on a frantic mission to prove he is humanity's savior before the disaster he's unleashed destroys everything." Again, technically that's true. You will see that story in the film. But you're also going to see something else and that something else is interesting and entertaining.