sligtly ruined because of identical issues *warning spoilers*

I really liked the simple way this movie was done, sincere about its mystery, unfortunately seeing before it Stay with Naomi Watts (which actually I did not like crazily) and Abre Los Ojos from Amenabar, its american remake Vanilla Sky, and The Machinist, did spoil a little my pleasure; I already seen people being dead, or in a coma, or in a post trauma experience, using all the elements and characters around them to create a virtual world, and in the end we have to be gently guided to see all the characters we saw in the movie explained, why the hero imagined them and placed them in his illusion.

So I was hoping for a different explanation, but as someone elese noticed in the forum, they surely did their best with what they had.