They knocked Yukon in a video and I've never heard you say they are a bad locker. I see their videos allot like those control arm bushing videos, highlighting something that really doesn't tell the story in a way that will help the consumer.
You've once said all the available lockers were pretty much equally reliable on the trail. I assume you don't include the Chinese knock-off because you haven't had any experience with them but you know what they say about assuming...
I think it would help if you understand who Yukon is. What they are not are inventors, designers or originators of good products. They are very good at sending shit through their various overseas copy machines so they can reverse engineer them, knock out some costs, and sell a cheaper imported version of what others have.
Get in touch with them and see if you can get them to tell you of a single product they have that is Made in USA that is not something out of a kit like a u-joint or bearing.
They recently (past year or so) started selling their own line of Made in China gear sets. I know from my local gear setters that they are crap and they no longer try to install them.
While the Yukon Zip may be reasonably (emphasis on reasonably) reliable, it is not their original design, it is a copy of ARB's older design.
Yukon only has one product I use and that is the hardcore hub kits. However, it is finicky, difficult to set up if you don't know what you are doing, and the running joke (well earned) is who originally designed it because it is too good of a product (once you get it working) for anyone at Yukon to have come up with.
Further, I set up our brake kits to work with the Yukon hub kits which were purchased from Warn. Since they have been taken over, I can no longer build parts, put them on the shelf and send them out as reliable fitting parts. Their production QC is all over the map, the bearing hubs wobble, the holes for the lug studs are at best a solid guess. Their answer to getting a stud to go into a hole that it is too big for? Get a bigger hammer. (I shit you not)
So now I get to have the brake customer send me his hub kit, I get to mock it up and solve the fitment and machining problems, make it all play nice together and then ship it all back. I spend an average of 3 hour per kit doing that and since I don't feel it is correct to punish my customer for Yukon's bullshit, I do all that for no additional charge, just a straight pass through of machining costs.
Still think I have no experience?