It's huge. Enormous. Big and fat. The writing is very detailed, almost an obsessive compulsive narrative of description where setting a scene for a conversation involves a paragraph showing gaunt trees, crumbling chimneys, fighting birds, carriage ruts in the mud, and so on. This makes it very evocative of the period, but slower-moving than Cryptonomicon, which I greatly enjoyed. Not so slow-moving that I'm not enjoying it, just slow-moving enough that it's a more languid read so far than Cryptonomicon.