I wasn't too impressed with this the first time I saw it, a couple years ago. But I don't know what I was thinking, because watching it this time, I was immensely impressed and think this is one of my favorite Hitchcocks. Halfway through the story, the answer to the mystery was revealed, but the rest wasn't anticlimactic because by that point I was so involved with the characters that I was eager to see how it would all play out. The ending shot is one of the coolest ever, by the way.