I'm not saying it was the best book ever, but I found it pretty decent, a relatively easy read, at a decent pace. The Cherie twist was a good one, as you say Shimbo.
The movie version is apparently going to star Pierce Brosnan as Lang (as Mark noted), Tilda Swinton as Ruth Lang, and Nicholas Cage as the Ghost. Pierce Brosnan is a decent actor, don't know too much about Swinton, and a bit wary of Cage. I either hate his movies, or love them, he blows hot and cold. But at least with these high-profile actors it won't be a load of old rubbish like the movie of Fatherland was.