I have a FHF original bino pouch with a rangefinder pouch on the harness. I used it extensively for several years including a trip to Africa and an archery Elk hunt in ID. What I didn't like about it was that it required me to carry my pistol on my hip, which is problematic when fishing in waders or carrying a backpack. To solve the backpack issue, I ran a Wilderness Tactical safe packer on the hip belt of my pack, which works well, but then if I drop my pack, I am also without my pistol.
Last year I switched to an HPG recon kit bag. I attached an HPG bino pouch for my Swaro EL 10x42's, an FHF range finder pouch, and an FHF GPS pouch that carries my Garmin inReach. I have been really pleased with this setup. I usually carry my Glock 20 in the kit bag, but I will switch to my 4" S&W 629 when in brown bear country. Both work fine. My Glock model 40 (long slide 10mm) with RMR on top also fits, but it is a bit tight.
I have carried pistols in various other kit bags pretty extensively. It is a great option when hiking or fishing in national parks or other areas where I don't want to be conspicuously carrying a gun. I can draw from the kit bag very quickly. It is not as fast as a strong side hip holster, but as I mentioned above that doesn't work well when wearing waders or carrying a pack. I also like that the kit bag protects the pistol from the elements. I will usually stash my phone, wallet, keys, and head lamp in it as well. When tree stand hunting, I'll put rounds in it to load my rifle when I get up in the stand.