First thing you need to know is that the trailer is quite disappointing and highly misleading. This film is not surprising at all, nor funny, nor well written.
All the jokes, all the so called suspense is in fact in the trailer. The whole film is in fact a never ending analysis of this very first scene with the bombing alert and the revelation of hidden secrets among this bunch of friends. And that will be it.
When the one and only idea of your film is a false bombing alert in Hawai, for a bunch of French middle aged tourists who are (because of their approaching death) obliged to reveal their so called "secrets" to one another (each secret is as boring as their pity lives), you know what you should expect with this film.
Sorry for being blunt but it's boring, absolutely pointless, and very rarely funny. A f.... waste of time ! (and money of course) .
Do not be mislead by the fact there are a lot of good actors in this film. It's part of the marketting isn't it? Many of them come with their comedy backgrounds and help to maintain the expectaction of a funny moment (that will never arrive) like Berenice Bejo (known for her part in OSS 117 Le Caire Nid d'Espions), Manu Payet and William Lebghill from whom we would expect much much much better scenes... Some others have surprisingly their part in this cast like Elodie Bouchez (fantastic actress but with a very poor role), Pierre Deladonchamps (used to very daring parts and probably the most surprising of them all) or the good-looking Nicolas Duchauvelle who is by far the most disappointing actor in this film with his (very classical) character of sporty macho that will never convince its audience.
A lot of very simple questions remain:
Why does it take place in the States ? What's the point ? Is it because it looks cooler ?
Why are there so many characters ?
Are we sure it brings something funny to the movie to pose nude on every scene ?
Is speaking bluntly about sex, drugs in front of teenagers a very original idea?
Does it bring anything new ? Did they need so many famous actors to deliver this piece of... ?
The answer to all these questions is: No.
I am afraid.