Ive ran Crooked Horn for years, a Rick Young harness for a season, then realized I hated all the bouncing and swinging around that type of sling allows, and went to a chest pack. Specificly a Kuiu, but have tried several. I hunt in HOT weather here in Kalifornia, sometimes 110 degrees or so, wanted something lighterweight but still secure, and the Kuiu's are pretty good. Badlands and Alaska Guide Creations are tops as well.
The Rick Young harness (which I still have) is good but Im just tired of my binos moving around, which they will do and it's annoying.