Out of 5 of us starting, only 2 made it to interview as if you fail on one criteria test, it's game over. My interview lasted for 2 hours, and considering we'd been on the go since 9am, I didn't leave until 6pm for a 3 1/2 hour drive back to South Wales! Knackering! Don't mean to put the frighteners up you, but trying to give you the full heads up!! Make sure you've got some good stories to tell!!
Just crack on and give it your all, and you'll be fine!
Hope this helps!