Has anybody used specs in order to prepare for SCDJWS? Can you share your experience? Is it a good approach? For instance, for SCBCD there is no book available, therefore I used the specs to prepare for the exam. And they were quite helpful.
I used specifications extensively when preparing for the certification and I feel it is a very good approach. Not only do you get firsthand information, but you also familiarize yourself with the specifications - something that is invaluable if you intend to continue working with web services after the certification.
Not all subjects require reading specifications though. Read the topics and apply some common sense.
I assume that you are somewhat familiar with the subjects. I needed to become familiar with basic concepts before starting to read specifications, so I read some books, tuturials etc.