I really like Timecrimes (Los Cronocrímenes) (Filmstalker review). It's a thought provoking film, and while it does have a couple of flaws in it that start to widen when you begin thinking about the film, overall it's a great film that is wonderfully written and superbly put together.

There's a new trailer out for the film, the U.S. version, and it's managing to show a lot of the ideas in the film without giving anything away.

Timecrimes (Los Cronocrímenes) tells the story of a man who witnesses what could be a terrible crime by a masked figure...actually I don't want to tell you much more and would prefer that you discover the story for yourself. Suffice to say that the man ends up travelling short distances in time in order to unravel and control events around him. However he finds that altering the past is not as easy as he thought.

I found the trailer through First Showing and have it right here:

For the review of the film, I've got it right here on Filmstalker.