Extremely well woven...

Rating: 8/10 (11 June 2011)

Source Code is what "Inception" aimed for, with added coherence and no plot holes that I can think of. Well worth the watch, it keeps the ball rolling in what seems to be a genre started by the "Matrix" and a few less successful predecessors.
The plot takes place in mental space, so to speak, like with the aforementioned titles, and as with both, there is little linearity in plot time. Somehow it also reminds me of "Groundhog Day" and specially "The Thirteenth Floor", again with added coherence as there are no questions left unanswered about "why" or "how" things were happening.
If I had to pick one particularly good point about this movie, I'd say that the script was marvelously written, considering how the time line unravels and how the plot is conducted. The only negative thing about the whole experience is that it comes directly after "Inception", and a lot of elements (specially the soundtrack) can be seen and heard there as direct "consequences" of it, so I doubt it'll significantly impact the industry at this point in time. But other than that, the script itself makes it well worth the watch (irrespective of how it was executed).
I give it an 8 for being a deeply enjoyable experience, although it should be noted that considering what was said above, it isn't revolutionary. As for the science aspect, if you know a little about quantum physics you'll understand why this movie is specially coherent and creative, and again, well worth the watch (not just for science fiction buffs).