If you like this type of era and film, you MUST get the set. They are glorious!
Roman Holiday get's first place, followed closely by A Place in the Sun and lagging in third place, To Catch a Thief. Audrey Hepburn and Elizabeth Taylor are luminous on screen. Gregory Peck is superb. I found Montgomery Clift a little hard to watch, he has these really odd facial expressions and at times didn't seem to be there. Cary Grant has never done it for me and Grace Kelly, while lovely paled in comparison to her fellow actresses.
The special features are so interesting, especially in light of the era the films were being produced - right after WWII, the start of the Cold War, McCarthyism, how these external forces influence the directors/writers/actors etc. It made watching the movies a richer experience.