It's not that bad of a grinder... a lot of the comments are straight off the COO Troll Bus.. baseless and have no technical merit, just because of the COO.
It's not an industrial build version of Dewalt / Milwaukee (yea never knew there was a differences till I got one)... It's just an average contractor grade like the ridgid I have... a little above home owner and a little bit above the HF ones.
It's not baseless and I'm sure its a fine grinder for the money. But after having a cabinet full of Feins in the past, spending big dollars on them but having them pay for themselves many times over because of how well they worked and for how long they held up to abuse compared to other machines we've had, there quality and build tolerances were very noticeable when holding them and using them.
You just exactly described above is the reason for the words of caution, Fein were known to being way better than what you described as "a little above HF ones"
It would be like buying a Festool on merit (a tool for life) and then finding out the COO is china and not made by the ones who use to make it. Sorry but it wont be the same quality, same tolerances as a machine made in Germany. The quality of the bearings, the hardened metal used inside (metal recipe used), the milling tolerances of pieces inside will not be the same, the quality control wont be German. There is an immense amount of technical merit to that and those things make it a professional, smooth, quiet, very long lasting and high quality performing machine.
The word of caution on these is don't be confused with what Fein has long been known for and what they use to make. This grinder is a bit of a bait and switch but I guess only to the ones who use to know Fein, not to newbies. Its like buying a Porsche at the dealership that was made in China and not tell you that.
I'm curious if these have the same length & type of warranty as the Feins made in Europe?? I'll agree $50 ea is a good price for a good asian grinder and for one thats just above HF quality (like you said). I'm sure they're fine for what they are. Sorry for the rant