ThatNinjaHorse, you sound as fussy as me with your choice of instructors. There's only 2 here that I'd use on a regular basis, the one I'm with now I've been with for about 8 years now and she is excellent, very correct and has a very good reputation Australia wide. The other is just the most beautifull, natural rider from Sweden. Other than those two, I'd prefer to not have a lesson than go with someone else, unless we get a coach from overseas that I like the look of.
I don't do the 'riding school' thing, can't stand the clicky 'saddle club' style groups the kiddies form there, so I go and take my horses up on a weekday when I have time off work to avoid them :S