I went through to the second level and NONE of my group of 8 got in.
I studied my guts out for 3 months before the first interview and carried on into the second. 10 months total.
I was ready for anything and practiced on the 47 sim. I was a little uncomfortable with the way some of the questions were posed which may have caused me to appear uncertain and wished they had asked me some of the questions that the other guys got that were a little more specifically technical in nature.
Study EVERYTHING AS MUCH AS YOU CAN. Practice practice practice. Pay for good books and pay for sim time. Pay for phone calls to Cathay whenever you need to. Make sure your logbook is up to date and entered for each and every day that you have ever flown. Know your current aircraft and operation well.
Don't ever say to yourself: "well that should be enough."
Oh yah... and keep your fingers crossed.
VRThomas