I tried several gyms in the Summerlin/Las Vegas area, and Summerlin Crossfit was by far the best for me. The coaches are all extremely knowledgeable, and always helping teach and correct technique. Classes are just the right size (enough people to keep you motivated, but not so many that it's crowded and the coaches can't keep an eye on everyone). The other participants are very friendly and great company during a workout. I always enjoy my time there. There's a good mix of beginners and experienced athletes. Mike (the owner) knows everyone, and he is always looking for ways to make the gym better, by adding new types of classes or getting new equipment. I'm hooked, and look forward to going to the gym every chance I get.