I've been doing CFC for about a year and a half. When I started, I was an overweight couch potato who couldn't easily keep up with the class. The instructor was always encouraging and pushed me to do my best, offering modifications of exercises whenever I needed them. I lost weight, built endurance and fitness, and feel so much better. There has been natural additions and attrition in our group, but the overall vibe remains super encouraging, welcoming, and supportive. This is the first exercise regimen I've ever stuck with this long, so that alone says a lot!