It was tough after 4 weeks of parttime study. Exam was challenging in many areas - cannot be rushed and 120mins was sufficent with time spare to review my 20+ questions. I had done both the User and Developer training. read the Ref manual inside out and practiced with the Tutorial and practice questions from this site. I have bought Qlikview books 2 for extra support. In the end if you understand data modelling and front end concepts it should be fine. However, i have to admit I spent way over too much time to grasp the topics till I was 80% comfortable. It does help with a bit of experience too. I started with Qlikview last October 2013. Was 0-30% of my weekly task in SAP BW/BO team. Im having a cold beer, beers to catch up on my lost time.
