I've been using Custom Fitness Concepts, LLC for over 18 months and I really like them. First, I like how you only pay for the classes that you attend--it's not like a gym membership where you're paying regardless of whether or not you actually go. I like that the workouts are rigorous and have a variety to them but that the instructors don't push you out of your comfort zone. Instead, they are tailored to your individual strengths and needs. As far as the two instructors I've worked with, they are nice, knowledgeable, and encouraging. I definitely feel when I'm finished that they've put me through a workout. Overall, I just think it's a great concept and I'm really happy that I found them!