A little touristy? Perhaps... but a heck of an experience, and views to die for.
Not sure you'll be able to climb a bridge like this anywhere else, and I'm pretty certain it's off limits in the US. It's expensive ($200-$300 per person) and you cannot take a camera (not even your iphone up there. (Your climb leader will take a picture of you).
Join AFAR Experiences and discover the REAL Sydney–May 6-9, 2013: http://www.afarexperiences.com/