I am a former member of this box. I spent about a year as a member there, off and on. One of the things that I liked about being there is that they are patient and will work with you, no matter what your fitness level and physical limitations are. Dan worked hard to make these very intense workouts compatible with a body that had been worn out from years of basketball.
In the end, my work schedule and physical health made it impossible for me to keep being a member. My wife is still a member and enjoys the positive social environment and physical results she's seen. Nothing about it is easy, but if you keep a good diet and let them guide you, they will give you results.