It's a good idea to do well on the initial sim assessment (ie practice!!!!!!) before you do the ezy assessment despite their recommendations not to 'practice'.
Avoid the advanced handling course if you can, lots of good pilots in the past have fallen foul of the vagaries of the system, ie dodgy ctc idiots, ignore the other post some of them certainly are idiots.
It seems to be a pension boosting scheme imho, as they charge 23K whether or not you do the AHC.
Good luck, and don't hand in your notice if you have one at your old company before you complete the AHC. Believe me EZY aren't worth it!!!!