I have one from the very first batch, actually had it out yesterday put about 300 rnds of the non-corrosive can ammo stuff through it without a problem. I have used Chinese steel case, wolf lacquered steel case all without issues. In total I have put around 1500 rnds through it with no issues.
I have used Croatian, old china stamped, and an assortment of steel mags I have acquired over the years without issue, I did have a problem with some new production 10/5 mags I bought off the board here a couple of months back ( I could tell even before I put the mag in the gun they were going to be problems). I have not tried any polymer mags so can't comment on them.
I have never experienced any of the issues listed in this thread, I guess I am lucky? not sure.
I bought a T81 fixed stock around the same time as the M10, and sold it this spring , it was a good firearm as well but just was not using it, the inability to mount optics played a big part in this.
My one big complaint about this firearm is the weight, it's heavy.
My guess is you are not getting much feedback from the thousands of people that own these rifles because the thread always ends the same way.
It also sounds like quality control is iffy at best, not sure what is going on with their production; from what Cork has described above he was sent a real POS, I would not be happy either.
This is just my opinion I am not trying to defend it "because I bought a crappy firearm" I have bought lots of crappy firearms over the years and have no problem cutting my losses.