What an interesting topic. Thanks for starting it.
My wife and I are just starting out, and we decided on an AM studio. We couldn't be happier. I don't know where our teachers are on the scale of things -- but they kick out butts when it comes to dancing! We are doing real well too. I think it is encouraging for them when they get students that they think can, well, do it. We are doing our study at the Woodland Hills studio in California. Perhaps it is exceptional; I know that the franchise owners are coming from one of the top ranked AM spots. But all our teachers are tremendous (and amazingly lovely!). We consider the experience well worth what we are spending (signed up for 1 year of bronze instruction). Another thing we like about the AM experience is that we always have a place to go dancing on our date night where we can really dance! We have our instruction and then stick around for the party. I can't tell you how worthwhile this is to us. We would have spent the money going to dinner, or a show, or a movie -- instead, we rhumba. Our romance has gone up tremendously, and we are getting some dang good exercise.
So, if you are on the AM track, my best wishes. You are providing an important service that helps people like my wife and I. Good for you!