That's actually a good movie compared to V's mostly lame list, and not exactly a rom-com. I'd recommend you to watch the original version (L'appartement) which is much better, starring Vincent Cassel & Monica Bellucci.
TBH, I was able to follow the story quite easily. I don't know why people are confused of the ending. If you judge it based on the concepts introduced in the story, it's evident he's not dreaming.
It's a great movie indeed, but IMO Shutter Island was a bigger mindfuck!
Classic Italian young adult movie, nothing is really wrong but everyone is neurotic, obsessive and unhappy. And has no idea what he wants, only knows he has to do something, anything. Yeah, very original.
I did too, and it was frigging fantastic. Quite powerful, not because its a twist, but because of how its done. Also say Up!, and yeah, dont think calling it awesome would suffice. What a wonderful movie.