Speaking as someone who has made an extensive study of the live-action Disney films of the 1960s-1970s I can say with some authority that this is truly one of the worst films ever released by Disney; almost unwatchable. With the charming Dean Jones and Yvette Mimieux at the center of a romantic plot this film has its moments (along with a delightful Maurice Chevalier, in what is a small role though curiously first-billed), but it is constantly derailed by the need to add monkey antics to the mix. Bringing in trained animals is a constant source of mirth in Disney live action gimmick comedies; it works in a Bubblegum Pop/ College Comedy setting (see the Disney film "The Monkeys Uncle") but against the backdrop of an American desperately trying to save an olive farm in Provence the entire film just fights against itself for a hundred minutes. Supporting characters rage about for no apparent reason, constantly entering and exiting the plot with no apparent motivation; and we are supposed to believe (and the plot hinges) on the concept that the entire village would be outraged that a man would use trained monkeys to pick olives for a harvest that last but three days a year instead of hiring locals is a stretch even by Disney standards (and this is the studio that convinced us a boy could turn into a dog and a car could have a mind of its own).
This was released in the year following Walt Disney's death. One might wonder if he would have chucked the entire thing rather than release this to theatres under the Disney name. It is truly shocking that this film made it to DVD before many other, better-remembered titles from the era.