Top positive review
Pick the paperback over the hardcover
Reviewed in the United States on December 23, 2018
If you want a physical edition rather than a Kindle edition (as a comic reader for 30+ years I still prefer reading comics printed on paper), I recommend the paperback version.
The paperback copy I purchased was in excellent condition. The binding was firm, no loose pages or cracks in the spine. The paper was glossy and high quality. When reading I was never distracted by any physical flaws. My one complaint is that the map of Battleworld is printed in middle of the volume so some of it is lost in the binding, but that didn't affect my ability to enjoy the story.
Supplemental material included a gallery of all the variant covers (and there were lots for this series). They also included the Free Comic Book Day Secret Wars #0 at the end, despite the fact that its story is more of a prelude than a postlude. As far as I can tell the hardcover doesn't have any other special bonuses. This is not a situation where the publisher cut corners producing the paperback, but the hardcover is the "prestige" version. The hardback doesn't give you any more material or any better reading experience, but it costs more.
Concerning the story told in this volume, I would call it a satisfying bow to the long story Hickman told through various Marvel titles. I cannot say how much you would enjoy it without reading his Fantastic Four or Avengers books before. Having read them this felt like a brilliant capstone on a monumental work. Esad Ribic's art has a touch of high fantasy to gives this story that epic quality. Ive Svorcina deserves mention for his color work which deeply enhances every page. Even among the universe of Marvel stories, this felt special, like a myth superheroes would tell. I loved it!