Comments about the Catapult Sling
The strap pad does not move, it is stitched to the strap, and it is positioned right up next to the bag itself. This has a couple of negative impacts. It means that unless you want to take the strap completely off and reverse it, you can only wear the bag over your left shoulder. It also means that the bag is always vertical on your back, no matter which shoulder you use. That seems really odd and makes it so the bag is not easy to swing around to your front to access.