I read this book over a 3 day period and overall found it interesting, quite exciting in places. Superman The Movie had a great influence on me as a child. I couldn't help but compare the film's portrayal of Krypton to Anderson's alternative. They are VERY different. It may be sacrilegious to say it - but I prefer the film's visual depiction of Krypton.
In the film, Krypton's Council are both noble and misguided. Their disagreement with Jor-El is based on scientific REASON. In Anderson's book there is such a chasm between the scientific genius and reasoning of Jor-El and the maddening stupidity of the council that I ended up not caring what happened to them.
I also had a problem with the amount of "screen time" given over to the Zod sub-plot. In fact the whole story hinges on Zod's turning to the dark side - unfortunate if, like me, you are not so interested in the evil trio.
Having said all that, Anderson, for the most part, does succeed in creating a doomed alien world rich in history, culture, science, and conflict. All the elements are there to bring Krypton alive on the page - and in a uniquely Anderson way.