It started slow, but I wound up enjoying it quite a bit. The characters were, as usual for Turtledove, the best part. The overarching theme was about Cold War politics, which dates it pretty badly. It didn't have the bubbling imagination that an SM Stirling treatment of humans landing on an inhabited Mars would, but I actually appreciated it for what it was. I got to thinking after I finished and I realized that all of Turtledove's books are ultimately about how ordinary people get caught up in big historical events and even the important decision makers are pawns of historical processes.