anyone know anything about usa standard gears?

looking into gears and came across USA standard gears anyone ever used them before feedback please thanks!

I have them. They are quiet as can be. I wouldn't hesitate to purchase them again. Also the bearing kits come with top quality Koyo bearings. Koyo bought timken's automotive bearings a couple years ago so you can't get any better.

i am running them along with the above mentioned master install kits. so far so good, prob have 10,000K on them now with frequent diff oil changes mostly so i could keep an eye on how my cheap gears were doin. everything looks great, quiet as can be.