Jackie, I too just started doing CF recently, and have a great instructor. Very informative, not GUNG HO MACHISMO type, and extremely encouraging. Prior to this, I have been swinging kettlebells and have seen similar types(who teach wrong)that are all about the Weight increase at all cost, and not proper technique. The KB gym that I worked out at(had to move due to location change:-( has great instructors and are very focused on form, technique, and increasing weight only when the student was properly ready to.
I say stick with CF box if it makes you happy, and that you are getting what you want from it. I too am really enjoying the CF. Free your mind, and your Grok will follow!