The Ultra light one looks cheap to me. I have not seen it in person but that is just the impression I get from it. Guys that have used it, does it bounce around when you hike because of all the elastic / spandex? I've had my eye on the Kuiu bino harness. A buddy I went hunting with had it. Can open / close with one hand, no elastic so it does't bounce around and protects binos well. I think it will be my next purchase.
Cheap? At $20 I guess it qualifies as "cheap" as far as price goes, but it's well made. I think a better word for it than "cheap" is "simple", which it is - simply amazing. The elastic is the reason it DOESN'T bounce around. In my experience, in order to get a nylon harness tight enough not to flop around, it starts to get VERY restrictive and makes for hot spots. Nylon, or any other type of non-stretchy straps suck.
