I read a chapter each week. I finished some chapter faster, but i had another important things to do (kids, spouse, movies, work, etc.).
I noticed that some friends too longer because they dedicated less time. Some folks here take one month.
You can do it much faster if you focus on the exam, but I think that 2 months is a good time. by the way, I used the same scheme for the SCWCD and it worked too. I dont know wich one is the next, but i will do the same.
The book is great and the is plenty of resources in the net. javaranch was very valuable, I used in at launch.