There is definitely merit to the claim that the SC hitch is more reliable than the dual-cam due to setup. I've had to re-adjust mine switching vans, and I've seen some not setup properly, and several posts on the forum about poor performance, because they never set it up initially.
That said, I'm not a fan of friction hitches. In adverse conditions, they have the potential to make things worse.
I had planned on getting a new Dual Cam setup for my new trailer, but ended up with the Blue-Ox Sway Pro. Couldn't be happier. It rides better, sites up easier, and is easy to hitch up. I don't have to worry about turning too sharp for the trunnion bars anymore, which is what made me consider it in the first place.