To be honest, I do not like Ashton Kutcher. But I remember seeing the preview for this movie and going, hm, that doesn't look too bad. But I stayed away.
When I finally watched it on TV, I was completely blown away. Very well done. Possibly one of the best modern thrillers since Hitchcock's death. Some of the ideas weren't fully explored, but they did an excellent job with what they did explore, given the time constraints on a feature-length film.
By the end, I'd totally forgotten the main character was Ashton Kutcher. And that's a very good thing, if I can forget who the actor is and start to enjoy the film in spite of that. And the ending was perfect. Not happy, but not sad, either. Just a touch melancholy. Perfect. I highly recommend it for those who don't mind a bit of time travel, and like thrillers.
9/10