The film doesn't begin to become truly interesting until about 1 hour and 39 minutes in (1 hour remaining); which means more or less an hour and 40 of character development.

There are important elements in the character development, just a bit too long winded for me; I had to finish the film in 3 sittings.

It does have an interesting historical twist to well known historical characters...

But the setup IMO is long winded... If Tarantino had managed to whittle this down to say somewhere around 2 hours, I think it would have received far more acclaim and acceptance for this piece of work.

Hats off to everyone involved.