I've been at Northern Suburbs with Kira too, so will look out for you and Bayley next year.
I'm not a fan of halti's either, I want my dog to learn to be good for all situations, not just for when she's wearing a halti. It may be slower going but I reckon it makes for a better dog.
Northern Suburbs pretty much give you a different trainer every week. I like that because there's a chance I'll find a trainer whose methods/ideas Kira and I click with, but on the other hand I don't like it because they never get to know my dog. Great people though, and if nothing else Kira has fun when we go.