I have never read The Host or any of the Twilight books, but I have seen all of the movies. So, I assumed I should not expect a big screen adaption of a literary masterpiece. Not having read the novel, maybe Andrew Niccol just did a horrible screenplay adaption. The acting is about on par with a Twilight movie, but the script doesn't particularly challenge anyone either.
I love Gomer Pyle, but if I've got to go fight the man, I'm standing behind Black Dynamite.
If you've seen any Vince Vaughn, Ben Stiller, and Jonah Hill movie in the last 5 years, you can fill in the blanks that the trailer leaves. I've lost faith in any of them to carry a movie by themselves and putting all three together doesn't help their odds. Richard Ayoade does put in a quality comedic performance, but it's overshadowed by the recycled performances of his co-headliners. On the bright side, the aliens were well done.