I was a little skeptical with some of the reviews I've read about this company, but in the end decided to go for it. M1 machining has excellent prices and no shipping cost which is great. When I received my 80% lower, it was in great condition and was exactly what I was I looking for. Had to do a small amount of drilling on my own for the holes to line up, but overall I got what I wanted. I don't know why all the bad reviews but my experience with M1 Machining was excellent and even talked to the owner James on the phone and he helped explain the instructions to me a little better on where I was getting confused. Will definitely go with them again when I start my next build.