10 days after my last exam, I've successfully passed the 'Designing Web Applications' exam!
Some people say it is too easy, but hey, it is multiple choice... eigher you know the answer or just guess. If you know your stuff (i.e. worked with it, or studied very hard) then spotting the right answer shouldn't be too taxing.
In any case, I heard the format will be changing in June.
By the way, Transendor practice really helped me. You can't learn .Net from transendor, but they will give you questions you may not have thought about. Once you have finished all three practice exams, just keep taking a 'random' exam again and again until you understand all the questions you got wrong. And make sure you randomize the order of the answers just so you don't remember which number to click without thinking about the question.