I have owned a handful of them and currently run the FHF for my Swaro 10x42's. It's been fantastic. After using it the first time you have one of those moments where you ask yourself, why didn't I buy one sooner! I really like the size, comfort, ease of use and quiet to open. I can open and close...or just drop the binos in with one hand. The pockets are minimal, with really only room for a wind checker and maybe a small call. I like it minimal and compact.
I enjoyed the bino harnes so much I then bought the range finder case and lanyard. That setup is great and makes it very easy. I mounted the range finder on the horizontal chest strap towards my right arm. Very easy to pull out, range and put back with one hand. I also bought the GPS pouch and mounted it to the waist belt of my pack.
The only other harness I would consider is AGC. I have not owned one, but very similar FHF. AGC looked a little more bulky, shoulder straps were a little bigger (concerned how it would feel under a heavy pack), design emphasized more pockets, lid was more complicated and restrictive. (If I was going to be rainy conditions all the time I might prefer the AGC lid). Those are all overly picky comments because they are very similar, but I had to decide between the two. Can't go wrong with either really.