A few words about my experience:
I attended the BQ in Hamburg a few weeks ago.
I took my time and prepared using different types of tools prior to the assessment. Also the information provided over here was useful for me.
However after taking the tests I was told that I actually failed a number of sections and I can reapply after 24 months.
The approximate pass rate that day was 25%.
I have over 6000 hours flying experience including 3500 wide body jet. Actively flying for a well known carrier.
Well seems like I am not suitable to be a pilot after all
Good luck to everyone who is about to take the exams.