I've got both Black Rapid and Peak Designs, the BR is on my old camera and the PD on the new one

I find the PD is much easier to use, and much nicer when carring a camera.
I'm curious how solid the Peak Design connectors feel. BlackRapid uses all metal parts, with a metal carabiner on a metal swivel connecting to a metal lug that screws into the tripod socket. The PD connectors always looked like thin cords with plastic connectors, although countless people swear by them. Do they feel solid enough? Again, I will mention that an L-bracket with a QD socket on it is my connector of choice now, although it can be hard to find compatible straps (but easy enough to adapt with a $12 part).
Been using mine for a couple of years, with no problem.
Heaviest normal load is a D7200 + 70-200/4. Using a flash on a bracket is heavier, but I don't do much flash work any more.
PD did have a recall of one version of the connector. The cord material was wearing through faster than expected.
Mine were OK, but just to be be safe, I replaced the connector.
It is a relatively thin cord, compared to a strap, so you should check it periodically as part of general maintenance. Takes less than 10 seconds.
And because the cord is thin, whatever you put it on should be rounded, and not have sharp edges.
What is also nice is that PD has different width straps, that I can match to the gear.
I use the wide Slide on my D7200, the medium wide Slide Lite on my Olympus EM1, and the narrow strap on my Olympus EM10.