I have now had the chance to test out my two new Black Rapid RS 7. I have to say I have mixed feelings here... I did a shoot where I had them both on in a cross with two cameras and lenses attached. It worked fine. Why the mixed feelings? It feels a little plastic, and the other day I was using one of them with a 1Ds III with a 200 F2.0L, and it made a continous squaking noise, that made me fear that it could actually brake because of the weight. Second, it slips down again after I have raised the straps (to have it in hip height) and that's a bit annoying. I think I will actually test out the Sun Sniper straps (more expensive, but seems more solid (in addition to having the steel wire inside).