I'm very glad Canal has invested in restorations for these early Hitchcock films. There probably isn't much money in these restorations as the films have been in public domain for decades and can be found in every DVD bargain bin. They look very good for their age but I question some of the "foley" work added to the soundtracks. In the sound films, it is obvious that tinkling glass sound effects and other little audio nuances have been mixed in to the old mono track.
The films will be primarily of interest to an avid Hitchcock fan, with their subjective camera tricks and embellishments, early examples of the Hitchcock style. "Murder" yields some interesting moments, such as the melodramatic musical cue of "Tristan and Isolde", later used as a basis for Bernard Herrmann's "Vertigo" score.