For fans of Verhoeven's American work, these films will certainly be interesting as we can see significant similarities and differences between his Dutch and American works. Obviously, the Dutch movies are older, and some things are now outdated (notably "Business is business" feels so terribly outdated it's almost embarassing to watch, and I imagine it's included primarily for historical interest). On the other hand, whereas his American films are mostly Sci-fi-based, a few of these films are period pieces based on autobiographical writings, and as such the Dutch films are more based on realism (for instance, the excellent WW2-drama "Soldier of Orange", and the 19th-century period piece "Katie Tippel"). Nevertheless, we clearly see the themes that always run through Verhoeven's work: moral ambiguity, sexuality, violence, religion, plot ambiguity, etc.).

I should mention the two gripes I have with this box set. First, although the films are old, many older films these days are rereleased on DVD with a remastered 5.1 soundtrack. Although the mono soundtrack here is adequate, it's just too bad we get to miss the surround sound. Second, the omission of "Spetters", which is strange because that's such an interesting movie, and it would have been a better inclusion than "Business is Business".

I guess you can look up descriptions of the individual films by looking up their single-disk versions. Just a brief summary for each:
"Business is Business", his first movie based on a book of short stories written by Albert Mol (who has a cameo appearance), is a comedy about two prostitutes.
To a degree, "Turkish Delight", based on the classic novel by Dutch author Jan Wolkers, also feels somewhat dated, although it's less bothersome here, the story feels like a period piece stuck in the '60s or '70. It's rated as one of the best Dutch films of all time, and it's a drama about an almost-obsessive, intensely sexual relationship.
"Katie Tippel" is a "rags-to-riches" period piece based on the memoires of Neel Doff (1858-1942), set against the background of the rise of socialism in the 19th century. Although this story is also about a prostitute, it's a very dark story.
"Soldier of Orange" is a WW2 drama based on the autobiography of war hero Erik Hazelhoff. If I'm not mistaken, it was rated by critics as the best Dutch film ever. Very interesting, very good movie.
Finally, the best one, "The Fourth Man" is a surreal movie based on the novel by Gerard Reve. In essence, it's both an art film and a "parody" on artsy movies. Large parts of it were "re-used" in "Basic Instinct". Although this one is much better.

Thanks for taking the time to read this.