I thought it was a huge case of style over substance. The characters were designed to be hip, but failed to pull it off. The dialogue is a great example of this. When the characters referred to committing suicide, for example, they used the term "offed" - as in "when I offed" and "how did you off?" None of them said killed myself or committed suicide. No, they had to use this terminology that sounds cool and makes killing yourself seem like a hip thing to do. Which brings me to the next reason I didn't like it.
In the reality of this film, when you kill yourself, you are taken to a world abundant in beer, petrol, food, etc. Zia and Eugene drove around drinking and meeting strange and interesting people... and then Zia comes back to life. And even though Eugene doesn't come back to life - he ends up leaving with his lover on a private train carriage after sipping champagne at some unexplained bar at the train station. So basically what's the message? That if you kill yourself you'll have a surreal experience and travel to a world where you make friends, have seemingly never ending amounts of alcohol to drink, go on cool adventures and then wake up back in the real world? When Zia killed himself he was distraught, heartbroken. When he woke up in the hospital he was lying down beside the love of his life. So killing himself basically solved all of his problems.
The actor playing Eugene was over-doing the hipster foreign guy bit. The actress playing Mikal annoyed me in the same way that Zooey Deschanel does. I thought she was poorly made-up to look like an alternative chick when really she's just a Hollywood actress with a cute hair cut. The film was a waste of Tom Waits and Will Arnett. They are the only reason I watched the film until the end and it wasn't worth it.
The flashback scenes to the beach with Zia and Desiree where horribly cliched - why is it in bad films when the character is reminded of someone that they presumably had countless adventures with, they always remember one scene that most often is lit like and looks like a bikini commercial?
I could go on and on, but mainly the film didn't do it for me because it was pointless pseudo-intellectual art trash and the film makers seemingly have no concern whatsoever about how suicidal people are going to re-act to this film. It deals with a very sensitive subject as if it is a joke... and it spends an hour and a half cracking bad jokes that mostly fall flat only to end with a happy Hollywood ending bullshit conclusion that means nothing.