Now that this film has been restored for DVD by Image Entertainment, it is a joy to watch -- nice but not flashy photography and directing, and masterful but not overbearing acting make this a good find. But it's not quite as satisfying as "The Body Snatcher" on the same Burke/Hare theme because it doesn't engage the dark undertones of the human psyche through its sadistic "graverobbers" as much as the Karloff film, but instead dwells more on the scientific ethics issues. Still, some sick, slightly scary scenes with Pleasence. Cushing is excellent as always. If you saw this on video or TV, you might want to give it a second look (like I did) on DVD because it looks a whole lot better.
Review of The Flesh and the Fiends
