Hyperion won the Hugo Award for Best Novel. It has a somewhat Rashomon-like structure where the different tales of the Shrike pilgrims explain details of the setting, and then throw twists on those details. It has vividly imaginative environments, like the forest of tesla trees which store and emit electricity.
It also has no ending, which I discovered in an absolutely infuriating moment. I have no objection to books being split into two physical volumes, so long as there is an indication on the cover that this is what has happened.
I have the "sequel" on order. There had better be an ending in this one.