I have the RS-7, this is a great strap. I do not find it difficult or annoying, nor does it impede portrait shooting. Some downsides are: I do not like having to take the strap off to mount my camera to a tripod, and the strap is bulky in my camera bag. I have, but do not use the little sports strap under my arm. With it on, I feel like I have to adjust my shirt and sleeve more often. As I slide my camera up to take a shot, it is smooth. Sometimes the strap slips off my shoulder as I shoot and I have to adjust.
This strap is not perfect, but is WAY more comfortable than a typical neck strap.
I have the carabiner, it is solid as a rock.
KmH, what quick release plate are you using? I have a Silk tripod with the round puck like plate. I do have to take the strap off of the camera, then mount my tripod plate to the camera. I hate having to do this when I want to use the tripod.