One of my 8 AR family rifles is an Anderson, and a very close friend built his Mk12 DMR target rifle up on one. They're one of the most consistent lowers on the market so far as adhering to the same dimensions receiver after receiver, year after year, and their 16-inch barrels are 1:8 twist and non-chrome lined, the same as the Army Advanced Marksmanship Unit Match Rifles.
I wouldn't trade my Andy lower for a Colt, nor a H&R, an FN nor a Bushmaster.
A Daniels Defense, maybe. The Anderson black finish coating is not the same as GI, but seems to wear better. I do run mine pretty hard.
Good to know. I found an upper that matches the finish on my Anderson, color-wise. I’m pretty happy with it. Comforting to know it can be ridden hard.
About the only 'issue' (if you can even call it that ;^) that I've ever had with Anderson lowers involved the mag well - a Hahn 9mm mag adapter would not fit. That was likely due to the mag well being just slightly too rounded in the corners, to accept the sharp-cornered Hahn product. A PSA 9mm adapter fit the Anderson perfectly, as did a couple of other adapters I tried, from different manufacturers.
A lot of guys jump on the band wagon for a particular brand (like Colt), and criticize anything without their favorite label on it. I knew a gun shop owner a few years ago, who was a big Stag Arms fan. In reality, "the proof is in the pudding" - does it work, or not? In my experience, Anderson lowers work.
I wouldn't trade my Andy lower for a Colt, nor a H&R, an FN nor a Bushmaster.
There's a good article available, over at Lucky Gunner, that includes a little info (related to a couple of Bushmaster ARs) about why it's unwise to put too much trust in a 'big-name label':
https://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/