I've seen it once. That was... maybe twenty years ago. I liked the twist, but I don't remember being terribly ~into it~ (the way I got sucked into, say, The King's Speech or Secondhand Lions). Maybe I was too young; I dunno. It's almost more fun to be able to recognize references and send-ups, like a certain episode of Spy.
But what makes that movie special to me has almost nothing to do with the movie itself. My mom and I watched it with my grandfather one summer when we were there for a visit. :)