What about CrossFit?

I recently moved to a new flat and just from the window I can see an add for a CrossFit gym just around the corner. I don't know much about this discipline, but it sounds like a good work-out! I googled the gym, but the high price sort of dismissed my interest. Just now though, I saw an add for this gym coupon with more than a 20 % discount for the beginners course of 4 classes. It is still very expensive, but I am sort of tempted, much more as the slots are running out. I don't think I will stick with it, it is more about my curiosity. :)

Do you have any experience with CrossFit? Is it worth trying or generally doesn't worth the high price? Or any opinion you can share?

EDIT: Hmm, though now I see it is less than 250 m from my place and the normal lessons aren't so pricey. Only well, not terribly, just "normally" pricey :)