My main complaint with Crisis and Command isn't the way it's written, it isn't its political message, it's that it is BORING! Granted, a book mostly about constitutional law doesn't sound like a thriller, but since it focused on particular presidents, I thought the history would be interesting. And the first few pages of each chapter was...but that was it. Who knows, maybe the chapters on FDR, the Cold War Presidents, and the Once and Future Presidency were different. But I didn't make it that far. Since it was unfinishable, I give it 1/5.
If you're looking for a book to help you fall asleep at night, this is the one. But if you're looking for some entertainment, turn elsewhere. Might I recommend the book that started me on this mission: The Know It All by AJ Jacobs.
I could talk more about Crisis and Command if you wanted, but I think it would make for a boring review. Ask me, though, if you have any questions (about the first 250 pages).