I can see why this very well made film ranks at roughly a 3 out of 5 on Amazon. It's very stylishly done, no doubt, and it will keep you on the edge of your sofa all the way through. But it also sports some yawning plot holes.
The central premise hinges on an inventor keeping a SOLE copy of his proof-of-concept in his safe behind a picture, with no other copies, and still thinking that it's alright to carry this in his armpits to a public park. As though this were not enough, the FBI then finds exactly the same kind of a notebook to pull off a spoof. Finally, it's perhaps alright to drive a knife into someone without worrying about fingerprints. How's that for a plot hole.
Fortunately, the screenplay, the music and the occasionally thrilling dialogue save the day. On balance, an entertaining flick. Besides, it's one of the few suspenseful movies with a PG rating, so the entire family could watch it too.