My rating is more for the blu-ray transfer as a product than the film itself. You can find plenty of reviews of the film elsewhere - in my opinion, it's a brilliant film that ought to be seen by any fan of musical theatre or even American history.
In terms of the package, this is a great deal. The main feature is in 1080p24, which looks sharp and pleasing most fo the time, with only occasional shots showing up weak filming and/or transfer, with a lot of graininess or faded colours. These shots are very rare though. Occasionally, movement seems a little too smooth too, which may indicate some digital post-processing, but it's far from distracting.
The killer elements here are the soundtrack and the extras. I only have a stereo setup, but the soundtrack was hair-raisingly good! The best rendition of this fantastic score I've experienced.
The extras were great too, giving some nice insight into the making of this film and the history of the book. I especially liked the Liza Minelli extra, which although drawn out, is worth watching to see Liza singing Nowadays at the end.
In case it bothers anyone, all the extras seem to be 4:3 DVD quality (except the commentary I assume, but I haven't tried that), but still very enjoyable.