I use a wrist strap that attaches to the tripod socket on my cameras (non-Leicas). I prefer a wrist strap over a shoulder strap. It seems as strong of a connection as the strap lugs. However, I use it as a safety against accidentally dropping the camera, I don't let it hang from the strap normally. If I do need both my hands free, I'll either put the camera back in its shoulder bag, or if I do let it hang from my wrist, I'll stop walking so it doesn't swing around. and only let it hang briefly.