I went along to the assessment a couple of weeks back, I can say that it was an interesting experience.
Most of the items posted on here are pretty accurate, there are a few very small differences, but nothing to even bother about trying to re-invent the wheel.
The sim was conducted in the 747-400, again no surprises, you dont need to be superman...you need to be ahead of the aircraft, thoughtful, display good crm, and most of all be yourself
Got offered the job...turned it down though, on reflection not the place for me