Have passed today the exam with 75%, surely it is not the greatest result, but anyway, I am satisfied.
On the real exam I got loads of JSTL and EL qustions, it surprised me a lot because I would'nt say that on enthuware's mock exams fraction of EL JSTL questions as big as on the real exam.
Some question were exactly the same as in the ethuware last day test. So, it is highly recommended to go through the last day test before the exam.
My preparation strategy has been quite standart: HF JSPServlets, Enthuware test, the spec ( read once straight after the book. the spec is really boring, btw ), trying out examples on topics I didnt understand.
After all, I would say that trying out examples helped me the most. My advise is the following - Do not understand how it works or cant remeber a thing you are reading about? Try to fire some examples, listeners, filters, jsps, jstl, el, exceptions whatever... try try and try. That was really helpful for me. My average score on entuware before the exam was ~72% and franckly I expected more than 75% because I thought enthuware is trickier.