I have not had any experience with Yukon axels.
Living in Alaska though, I have come to avoid any product with names like Kodiak, Yukon, Denali, Grizzly, or Alaskan Guide Model.
None of it is made up here, they just use the names to make their junk products sound a lot more tuff than than they are.
83 CJ7 350 tbi, TH350, D300 twin sticked & clocked, narrowed Chief D44 Eaton Elocker & Moser shafts, Explorer 8.8 Detroit locker, 410's, RE 4.5" spring lift 1" body lift, 35" Claws, cage tied to frame, Corbeau baja seats, HD tie rod and draglink, u-bolts flipped, custom skid plate and sliders, Warn 9.5ti winch with Amsteel synthetic line
I haven't heard anyone bad mouth them, but I don't know anyone who runs them.
IMO both Superior and Moser make great products right here in the usa.
I would stay away from any of the imported ones such as alloy usa.