Terrible, excruciatingly slow with an awful amount of throwaway scenes that really just do not need to be in the film at all.
This is extreme self indulgence by Tarantino, he's a fan of Westerns... This film does not make any sense including the lead actor acting as an actor on westerns for an hour. We get it, the character is a westerns actor. Great. So what?
The ending is strong because the actors - Brad Pitt and Leo were fantastic throughout the film, as they always are. They did brilliant with the "story" they were given.
I'm a big Tarantino fan. This will go down as the worst Tarantino film, seeing as he's known for his fantastic stories, this film has no story.