Now, this vote was a tricky one:

If it was someone else's work, I'd give it a 8. I think Segel can do much much better, as a director of course, his acting was quite enjoyable. Since it's Segel work, I was about to give it a 6. But then, with Mila Kunis on it, it deserves at least a 7, doesn't it? What about Russel Brand?

The scenario is interesting, the acting are satisfying and everything goes well. Until the movie ends, leaving you with a "Wait, I was hoping that this was just a build up for the really funny moments of the movie" feeling.