Could someone just answer the question without pontificating about their preferences? If you don't use the system, then just don't answer. I use the system and have hiked all over the Southwest and South Florida with it. I've used it in cities all over the States. I carry my D800 w/lens, a set of filters in a pouch attached to the belt, two other lenses in a ThinkTank skin chimp cage also attached to the belt (the cage nicely balances the weight of the camera). The skin also holds cards, remote release, extra battery and a cleaning cloth. It's great to have your hands free when hiking and a godsend when your neck or shoulders can't take the weight of today's cameras. It's not going to be the way to go in all circumstances, no bag/carrying option is. For me it works 90% of the time.
I just found out about the Spider attachment for an L Bracket and before plunking down $95, I'd like to hear from someone who has actually used it.
Please, unless you have something to say based on actual experience, just move on to the next thread.