I've had the C-loop and the split strap for a almost a week now and have been out on 3 2-hour long shoots, lots of walking around for wildlife. 7D and a 100-400 mostly for BIF so it's a decent bit of weight on it. Lots of brush around the lakes and lots of up and down trails to climb. Strap never slipped or moved over my shoulder, the rig was at a comfortable height and very quick to grab for a shot. So far very impressed. I was a bit concerned about the attachment point to the tripod screw hole, but the thick gasket provided has let me lock the screw down and hold it very well. Best of all it got the regular straps off of the top of the camera and out of the way. I'm looking at their M-plate as an add-on later. My initial thoughts are if you haven't gotten one already I'd recommend giving it a shot.