First off, I'd like to make a correction on another review of this film which said that the last musical to win the Best Picture Academy Award was 'Gigi' in 1958. That is misinformation as 'West Side Story' won in 1962, 'My Fair Lady' won in 1965 and 'Sound of Music' won the year after that. That said, this film is absolutely fantastic! The story from the novel has been somewhat altered, but that's more because of the limitations that they had on a stage that they just didn't change back for a filmed version. However, I don't mind. In fact, I rather think the whole production flows better than the novel does. I like Nancy bringing Oliver to the bridge with her and being killed there instead of later in the apartment. The subtle things in this film are the ones that make me laugh. I love the moment Mr. Bumble and Mrs. Bumble start coming out at the beginning from the governors office. The underscore for that moment is brilliant. My three favorite actors for this film were Jack Wild, who plays the best Dodger in any film version of the story, Ron Moody, a playful and humorous Fagin (this character is worked out much better than he is in the book), and Shani Wallis, who is the strongest, most distressed version of Nancy. The only reason I'm giving this film a 9 instead of a 10 is because of the two big production numbers which are 'Concider Yourself' and 'Who Will Buy.' I always hate when the choreography in musicals in meant to look like people doing everyday chores and jobs. It looks awful and cheesy, especially when they're dancing at the London Meat Co. They should've just done regular choreography for these scenes. However, this film is a rare treasure that will stay with us, hopefully, forever.

The "Trivia" page on IMDb claims the filmmakers protested because this film was re-cut by the studio to "simplify the plot". If so, that effort was a total failure, as this is one of the most incoherent narratives I've ever seen in a film -- I'd hate to have seen it before the plot was "simplified."
It's sad to see Warren with so little character to go on that even he can't do anything with the inept material. It's interesting to see Caron in '70s mode instead of her Hollywood-era glamour garb and persona, but it's sad to see her haplessly wander through this doing-a- favor-to-her-producer-husband dreck. She would actually later hook up with and marry the director, instead -- who, you'll note, never directed anything again, but did strictly 1st or 2nd A.D. work in TV from here on out. That oughta tell you enough right there.
I call this "interesting" because I have an automatic fondness for American films of this period, and this role does add perspective to Oates' otherwise fantastic 1971 output (Two- Lane Blacktop, The Hired Hand). But the "1940s detective as fish-out-of-water in 1970s L.A." theme, which is the only thing the movie really has to say, is sold in way too heavy- handed a manner. A similar theme would be far more effectively handled two years later in Altman's The Long Goodbye. And as far as Oates playing a hard-bitten guy on a doomed errand, three years on, he would give his definitive performance in Bring Me the Head of Alfredo Garcia. If you haven't seen those, don't waste your time with this!