Hyperion is well written with varying styles for each story. I got the sense that Simmons was showing off, but it didn't bother me because it was so well done. Simmons also excels at concept, and most of the stories have an intriguing idea at their core.
On the other hand, Hyperion fails at structure--not having an ending is a big problem. Apparently, this entire book is just a set-up for Fall of Hyperion which I have not yet read. Perhaps I will have to revise my evaluation of this book after I've finished the second installment.
