I just started here after purchasing a Groupon deal for a discounted month membership. So far I love it! I'm taking the Club Mie Girl classes and the Goddess Body Boot Camp classes. The instructors are super nice and understanding that some people like myself are just extremely uncoordinated and don't have any natural dance rhythm.
Some of the classes are more of a workout than others. Some focus on toning and strengthening, some are more cardio based, and some are just fun. Any one you take will undoubtedly be burning some calories at least, its just more of what you want to get out of it. I would recommend trying everything to see what you like. Some of the classes were not what I expected them to be but I was usually pleasantly surprised.
As for finding them, their website is really helpful if you just click the "Where is Mie?" link on the side. It made it very easy to find for me