I've watched this film at least once a year since it first came out on VHS (or was it Betamax?) It is hilarious. I can't think of a better cast for a comedy than we have here, all playing around the central Dudley Moore character. The jokes, both visual and verbal, are rich with irony and wit. ("What is this, egg salad?" is my personal favorite.) The love story is only a driver for a comedy mix of this wide array of bizarre characters: Dudley Moore, Alec Guinness, John Huston, David Stathairn, Wallace Shawn, Ron Silver and many more whose names you may not know but who's faces you'll recognize.
I was quoting a line from the film the other day and got to talking about it with a friend. That led me to do a search on IMDb. The 4.3 rating makes no sense to me at all. It has my "personal 10", as it is a movie I can watch again any time. After all these years it is just as funny as it was 30 years ago.