How is this different from the QD? They both swivel, as far as I can see, and leave the release button exposed, rather than "protected" as claimed, at least with the QD.
What got me was a clip to the bail on the connector. With it guarded there's no way for that to happen regardless of the amount of swivel. The button requires a hard push to let go. If you get something inside the bail and it can cause a prying action you've got a problem.
I do believe in a safety strap because anything can fail and better safe than sorry. It would have saved me on that one failure.
There was a mention of speed and a safety strap. As a photojournalist chasing breaking news I'm aways in a hurry. Even with a safety strap it's quick.
If I'm shooting stills only I run with 3 cameras. I use the Moneymaker harness.
I can throw on the harness, hang a Z8 and 180-600 on one side, a Z8 and 24-20 on the other and a D850 with a 15-30 from the chest straps (Peak Design clips there) in less than a minute.
At the end of the day nothing is 100% but I love the speed and feel safe with the setup.