Mancini Stainless Steel roller rockers

Any body using the Stainless roller rockers that Mancini sells. Are these any good or Chinese crap?

GM,
Here is a link to the PRW's that I purchased, it is a complete kit. No issues after 500 miles, very quite, did need to slightly add some clearance on the back side due to the retainer diameter. They adjusted great with custom length comp magnum push rods due to decked block.

FYI,
Marion

Performance Quotient PQx Platinum Series Shaft-Mount Rocker Arms 3331812

I think that I caught these on sale 2 years ago. I'm happy with the selection