I went here for a trial period and also have known other students who attended here. First, I'll start with my experience.
Imagine the stereo blasting techno while you're doing martial arts. All twenty students stand in one line and after getting through the line, kick the pad and go to the back of the line. Meanwhile, the grandmaster is dancing to the techno at the front like he just don't care. Yes, this really happened to me.
Seriously, you'd be better off taking that Billy Blank's stuff from a video. Now I'll get to the people I know who've attended here. My mom could kick these people's rear's, no kidding. They just aren't any good, period.
Yes, Darimar has a good demo team. But by and far, their teaching is neglectful and nowhere near authentic. Please don't waste your time here unless you want a black belt in a year without really learning martial arts and self-defense.