The free lesson fortunately sucked me in a couple months back at the Colfax location. My knee was screwed up but the instructor said that my focus should be on re-building the muscles surrounding the knee... in minor ligament tears the worse thing to do is stop excersizing b/c the muscles get weak. At any rate, the school itself is Kempo, a mix of Karate and Kung Fu. The forms and techniques seem to be more practical and less drawn out than others. The problem I've had is that through sports as a kid and them moving around after college, I've done about four different types of martial arts, none long enough to get really good at anything. Not the case here. There are tons of locations...check out ussd.com. It is an expensive school at about $200 a month...but that covers the uniform, three lessons a week plus one private (those are what really add up in other schools, at about $80 an hour), plus instruction dvd's for each belt. Factor that in, plus the knowledge of the instructors I've met at the other Denver area locations, and USSD's a safe bet.