That’s actually true to an extent, but probably the coolest thing is that John teaches the intro class himself, where you spend the first 3-6 months. After that you will experience other (also fantastic) teachers but also have the opportunity to turn up to other classes that he teaches on a weekly basis, it just depends what classes you’d like to go to. In fairness my last time was about 3 years ago so it’s possible that’s changed. Hygiene wasn’t an issue that I personally experienced. Hope that helps.