Since I began going to Summerlin Crossfit three months ago, I have not went to another gym. While I primarily attend crossfit, the great part about this place is that in addition to crossfit, it has TRX classes, spin classes, personal training and even Barre. I have done all of the above except for Barre.
Chris and Mike are both incredible coaches and they take individual time to assist you -- whether it be in reaching a particular goal, working on a particular exercise or focusing on a sore spot or stiff muscle. In addition, they make workouts fun. There is a real sense of community here.
If you have never done crossfit, what are you waiting for? But be careful, it is addictive. Not only is it good for the body, but it is good for the spirit as well.