These rockers any good?

They look like the cheap china made ones. I had some of these on my 400 horse 340 they looked like new when I pulled them after 5,000 miles. I replaced them with gold Crane ones, they looked identical except the shaft was way heavier duty on the Crane ones. I bet the company that made these copied them from Crane. I had no issues with mine, will run them in a different motor with a little less HP. I have heard some had issues but only with the adjuster nuts stripping out from poor quality steel. I guess you could replace the adjuster with crane ones and not worry.