I enjoyed reading D&OITMK, however it was not as 'hard' as I generally like my sci-fi. It was interesting to see the changes to society that the end of scarcity economics and personal death may bring, but I never got a good feel for how we had transcended scarcity. I would have been satisfied if there had even been some token throwaway line like 'ever since we harnessed magnetic monopoles back in 2015, everyone had all the energy they could use'. Alas, there was no such explanation.
Additionally, our main character Jules had been in college when the Bitchun society was proclaimed. He mentions that he had taken classes in post-scarcity economics. If there were an essay at the back of the book (a la 1984's NewSpeak explanation), I would have been much more satisfied.
All in all, the writing is good. Mr. Doctorow's writing is good. I have high hopes for his other books.