What this film did was capture what is so wonderful about Dickens' novels -- the alternation between the humor and the darkness at the center of much human experience. The scenes were knit together flawlessly, so that a rather complicated plot taking part in two different places came together without confusion or awkward transitions. The pacing was artfully done, and the last 40 minutes or so were very suspenseful.
It's too bad the movie received so many bad reviews because it didn't follow the book. I've read the book and found it, like many of Dickens' works, to be wonderful, but also probably inaccessible to many readers. This film takes a good story and opens it up to those who may never open the book.