Need Carry Strap Recommendation

I have the same thing. (Originally on my 550D and now for my 6D). I am very happy with the C-Look and strap.

Doesn't have any fancy pockets, etc - but I love the way the C-Loop swivels. (Gives me more peace of mind that it's not going to undo under twist).

Feels quite comfortable to walk around with it sitting on the side. I can support it / stabilize it by resting my hand against it if I want

I will admit, I haven't used Black Rapid before, or anything else (besides Canon factory straps) so can't give a good comparison against other devices sorry. The only concern I had was that there was a single point of failure, but I realize that this is the same - even with the factory straps. Only one point needs to fail an the camera would fall.