For @joalemma, your idea of getting in the pool first is a good one. Great way to suss out new gear. My understanding of the original use/purpose of an STA was so that people who dive doubles a lot, can more easily switch over to a single tank set up without needing to disassemble their rig. You can just pop on the STA with cam straps already threaded and are ready to go. Having used a variety of tank types with and without an STA, I find that running the cam straps directly through my backplate keeps the tank more stable as others have mentioned.
As far as disassembling the gear, as others have pointed out, it's not needed and my set up fits in my luggage without taking it all apart. I do that because I like how it all fits in my bag better when it's taken apart. The wing folds up smaller than a hoodie. It takes me less than 10 mins to assemble once at my destination.
As far as disassembling the gear, as others have pointed out, it's not needed and my set up fits in my luggage without taking it all apart. I do that because I like how it all fits in my bag better when it's taken apart. The wing folds up smaller than a hoodie. It takes me less than 10 mins to assemble once at my destination.