it's pretty good in my not even slightly vast experience, you book in advance, they send kids in groups of 8.
so kid and parent goes into a 'sleigh'... you want to be last off the sleigh, so that you're at the back for the walk through the elf village.
when that's finished you are led into a room that looks liek santa's going to be there, so all the parents are muscling in, desperate to get a seat. if you're last, there's no seat, which seems but means you are in POLE POSITION when the elf opens the bookcase to reveal the real room where santa is. you walk in first, you get seen first. if you're last, you'll have to wait in a sweaty, dark room for half an hour while everyone else gets done. arf. doesn't pay to push, ladies.