Overall:
Good quality overall. I had to enlarge the holes on my headstock in order to get these machine heads on though, which was a little bit of a pain. I had to by a reamer for $20 which no one had ever heard of at Lowe's, Home Depot, or Sears. Finally I found one at Ace Hardware. Once I got it, it was easy to make the holes bigger, and everything fit nicely.