Thru the years, I have tried Optech, the camo one, the Ind Disgrace and now, using the IA [immediate action] strap.
Optech - the one I got doesn't seem to be as robust as some previous edition. To me it looks a bit sisi.
Ind Disgrace - used it for a year or so, and found it not so comfy for heavy gear.
IA strap - so far, this is about the best I find. Somewhat better than the more famous Black rapid strap. Reason being both the tripod bracket and the hook are pretty flat so that you can hold comfortably when you use the battery grip. And you can get it at a more reasonable price too. And at times, I hook it directly onto the triangular ring at the camera lug. Guess what, I was using it that way in the SS Virgo cruise, 2 chaps stopped and ask me about it as it looks real cool la.