I haven't used them either, but I have seen so many reports, scores even, of broken adjusters or broken rockers split at the bottom of the bore on forums and Facebook. I wish I had better data or a name, but in the end, seeing they are not that prevalent, a large amount of failures is extra scary
If they measure standard Ford, and shafts are hard enough, could be a cheap way to get shafts and stands. However, I have seen too many failed reports to trust their rockers, and with the quality of what Doug Garifo sells and has for many years, it's hard to even justify the cheap parts.