I cannot agree with most of the reviewers, here, about the movie itself. It's not that I dislike old movies; I'm actually a huge fan of movies from this era and of Hitchcock's later films. But, this particular movie has little to recommend it, in terms of entertainment value.
You can, at times, see shades of the greatness to come in Hitchcock's direction, but he hadn't reached anywhere near his peak, at this point. I found the acting to be stilted, wooden, and caricaturish; the pacing alternately inappropriately frantic and unforgivably plodding.
Judging from the reviews that specify the version, the Criterion Collection edition is quite a good transfer. Unfortunately, the Laserlight Video version is a waste of plastic; dreadful audio, grainy, alternately washed out and too dark, splices, skips, etc. It's the version currently selling for [$$], and isn't worth even that paltry sum.
Students of Hitchcock, buy the Criterion Collection edition, if you must own this film. Fans of Hitchcock, rent the Criterion edition, if you wish to satisfy your curiousity. Everyone, avoid the Laserlight Video edition, at all costs!