Powerbuilder crossfit is awesome for women, is makes girls hot. Check out the hot crossfit girls thread on T-nation.com for proof.
For guys it has major floors. Particularly for someone like you who harbours aspirations of powerlifting. The major floor is that it creates weak athletes. A good mate of mine is a crossfit trainer, even spent time in the USA to get certified, competes at the crossfit games, blah blah blah. He competed at Markos' 5 lift comp last year, he came last, dead last.
I was in Whistler last year and the only gym was a crossfit one, so I thought I would check it out after a day on the slopes. I saw they had a record board, I could not believe how low the lifts were. Nobody in the gym could squat more than 140kg or deadlift more than 200kg, and the gym has been operating 3 years!
If you really do want to be a powelifter then stay the fcuk away from crossfit.