Tried just about every neck strap and sling strap on the market (op tech neck and sling straps, q strap, black rapid, sun sniper, Matin to name a few lol) trying to find the best and most comfortable. I have finally settled on the Peak Design Slide. I thought the lack of padding would be an issue when carrying heavy gear but it really isn't, and can carry the D750 with Tamron 150-600mm on it all day without discomfort. The fact the camera doesn't swing about or twist around on this strap compared to others such as the black rapid an absolute godsend. For most comfort and least swinging I find have one attachment on the left strap lug on the camera, and the other attachment on the supplied tripod plate better than having it attached to both strap lugs on the body.