I usually like sci-fi when it's pure sci-fi. I usually like present day drama when it's believably real. Disaster, at least for me, looms large when sci-fi meets real life drama. So here we have a present day crime thriller crossed with sci-fi time travel...And, this movie kicks butt, works so well, in fact, it's nuances should be studied in film school. It's original enough to be compelling-where we are not in some distant future, but the here and now.
The story, the characters, and the effects mesh well to suspend belief to the point that you "get on-board" and enjoy the ride. This is the way to do sci-fi with believable real life situations. The cinematography, the implementation of technology, and even a beautiful (but presently dead) damsel in distress, combine to give the actors, who are uniformly good to excellent, the boost to put this in rarefied good sci-fi territory. Genre fans are shoo-ins and those who think they don't like sci-fi should enjoy this one too. 7.5 to 8 out of 10.
