It was beautiful, suspenseful, exciting, adrenaline-filled, conspiratorial, romantic, gorgeous...WOW. It managed to be bloody without being gory....sexy without being pornographic....suspensful without being esoteric...and it was wonderfully filmed. It was perfectly written, too...managed to stop just short of showing everything more than once, leaving just enough for you to think about, and never left you wondering in a way that annoyed you.
One word of warning, it is a French movie, and it is subtitled. Doesn't bother me, but I know some peeps don't like it.