Pros
GO work for an organization that cares about you. SIgned up for the PCT 2016 crew and it was a miserable experience. The main goal of the PCT crew is to milk every drop of sweat they can out of you at the lowest possible price. You will be worked to the bone and it is not worth it. If you want to pursue a career in trail work this would help you do that, or sign up for the normal program and that would do the same and be a much more enjoyable experience.
Cons
The PCT crew receives half the pay that normal 900 hr ace CA members receive but works significantly more hours. You will be placed in the deep south of CA in the hot desert. You will not be backcountry camping or anywhere cool on the trail you will be rebuilding the destroyed sections. Do the normal 900 program if you have to but stay away from this.