I've been training at Crossfit Virtuousity for 5 months, 4 days a week. I think that they have an amazing program that reduces risk of injury as compared to many other non crossfit workouts I have done in the past.

First off they stress mobility, which many workout regimens don't do. I never really realized how important this was until I started crossfit. Most workouts consist of 15-20 minutes solely concentrating on mobility.

Second, no one has mentioned the concept of scaling, which is core to crossfit. Every workout has a scaling option so that you don't push yourself too hard. If you can't do a pullup you do it with a band, can't do that, do a box jump pullup, etc. Yet another way crossfit keeps one from getting injured.