Anyone have experience with Holosun red dots? Chinese I

Yes, but not the smaller handgun models. I have the larger HS510C. They work great if you have astigmatism like me. Something to do with the way they are designed. The Holosun is nice and crisp. With other red dots the dot looks like a star burst.

I use one a M1 Garand scout mount. Liked it so much I bought a second to mount on a big bore Contender Carbine. Typically use the circle with the dot, manual brightness setting, shake on feature, auto shut off.

Components for any brand red dot are made in China regardless of where they are assembled

No problems with it. I actually love it. Put it on my daughters 20 gauge this past turkey season. I hunted with it more than anyone. Between everyone it accounted for 4 turkeys. I will probably put the same thing on my other turkey guns. It is a little more costly than some of the others but I like it because it is small and low profile. Very clear to my aging eyes. Time will tell but so far I have only good things to say about it. Get a dust cover for it though!