We have one of the new Kuiu harness in our shop right now doing a retrofit on it. I have not had a chance to take it into the field but it is comfortable, quiet and if you like the forward opening style vs an FHF (flip up) style it may be a contender. One thing I notice that may OR may not be an issue is that it is built to house "everything from 8x all the way up to the larger 15x bino's and the Height/depth of pocket adjustments are accomplished by using foam spacers in the bino pocket. The one thing I noticed is the width of the bino pocket is set to accommodate the larger bino's and a set of 10x42's (vortex) seem to wobble around in it. Like I said, I have not had time to get it in the field, speed walk, hike or run with it on to see if the bino's make noise or jostle but other than that I like many of the features and it has promise to be a serious contender in the market place. Those who use larger bino's will certainly take to it.
We also have a new Stone Glacier Skyline harness (just got it in) we are retrofitting and It is a very "NEW" take on a bino harness build. Quite genius the way they have tackled the multi bino size problem with a velcro lid (Velcro is used to adjust the height of the pouch lid in order to accommodate different size bino's). It is not a velcro closure. Once the lid height is set, theoretically it's not to be moved again. It is then used like all forward opening lids. I think it may end up getting traction in the industry as well and really like it. No field time with that one either but soon.
We have retrofitted just about every type of harness in our shop to date. My current and personal preference is the FHF. It's just simple, works and has very little bulk to it. It's my go to and I have been using one for years. For reference I am a small guy so that may just have something to do with my liking the fit, comfort, feel and utility of it.