I purchased this two weeks ago and I have only used the Cotton carrier G3 a few times. It took just a little getting use to but it works well for carrying two cameras. It seems to be very well made. I had a D850 with a 200-500 on the chest carrier attached by the Foot of the lens. It made the rig stick to far out in front of me and created quite a blind spot while navigating through the woods and over the rocks. I could not look down and see where I was placing my feet. After that I attached it to the tripod mount on the camera and it worked much better for visibility and balance of the camera, But I do not like all that weight hanging of the lens mount, not sure I will continue with it.
The second body hangs pretty well with a much smaller lens on it, But I was disappointed to find I could not move it over to the left side to keep my right hand and arm completely free to do what ever I needed to do. I would also like it to hang a bit lower, which also would get it out of the way a bit more.
The system seems to be well built, But I will definitely need to get new camera straps with the same quick connect buckles as the CC. I used the tether for the secondary camera but was not going to go through the trouble of taking the camera strap off the body and then have to put it back on. I tied it up to get it out of the way as much as I could. I put the camera strap of the chest mounted camera around my neck for added security and that seemed to work ok. I typically drive to multiple locations throughout the day and some are just quick stops with a single camera and I don't need the whole system but I do need the security of a neck strap just in case. I was not planning on buying three new camera straps with the same plastic buckles on top of the expense of this carrier, But I don't really see any other way of being able to quickly switch from the CC with the tethers to a normal camera strap. As it is I will end up with one tether being attached and the other flapping in the wind.

This is the first harness I have ever purchased. It keeps the weight off my neck and/or shoulders. It centers the weight of the camera fairly well too. I went on a short hike, I hade a 70-200 lens and body on the front and a smaller lens to the side. Both held securely with the hardware included. It would definitely get warm wearing this for too long in the sun, but it breathes well in cooler weather.

I only gave it a 4 because I have not yet used it in the field. Setting it up for the first time wasn't too hard but being a woman there are places of a little discomfort. I think a little more adjusting is needed. The only other thing is when putting the second camera on the waist will take some practice. My head doesn't turn far enough to see the receiver very well. I'm sure a little more used will solve that problem. I'm heading to Africa in 2 weeks so will update when back.

I am impressed by the harnesses ability to handle the workload. I configured my gear as such: Nikon Z8 paired with the Nikkor 400mm f4.5 and attached it to the hip lug. I attached my z6iii, paired with the Nikkor 800 mm f6.3, to the chest lug. I hiked over three miles with this configuration and aside from working up a sweat, the harness was comfortable and capable.

It is so nice to have my hands free when walking. I like the weight of the harness and the material. I will say it leaves you sweating under the harness when temperatures are above 74 degree Fahrenheit. Overall it is great and I’m glad I finally took a chance on it - no regrets! So far I have had my Nikon Z8 with the Nikkor 400mm f4.5 and 70-200mm attached to the center chest plate and it is comfortable and secure.