Originally purchased the SCWCD study kit book and read it from cover to cover, only to realize a new version of the exam was out (damn, should have checked sun's site before amazon!) so ended up reading HFS book as well. Was going to purchase one of the commercial prep exams, but decided not to.
Was surprised to see a few questions on dynamic attributes on the exam since this was not covered at all (except for a mention of it in a review question) in the HFS book. There were also a few questions on JNDI <env-entry> and the <ejb-local-ref> stuff which was covered very briefly in HFS so memorize what is in the book and then try to find a bit more info on the subject if you can. Based on my score, I suppose I must have guessed correctly as I did not have a clue for some of the dynamic attribute and
ejb questions.
The drag and drop questions really suck as you have to drop the code fragments 'exactly' in the boxes which was a pain as the mouse in the
testing centre I went to was garbage; probably wasted a couple minutes re-dragging stuff!
No big surprises otherwise. Scored only 72% on the HFS mock exam so you can draw your own conclusions based on that.