I purchased these tuners on a budget for my guitar with a broken cracked tuner. I was so surprised about the quality! Normal classic tuners tend to get dust inside and turn more sturdy, but these tuners, i have been using them for quite some months now, and they turn just as smoothly as when i first purchased them.
The finishing on the decorations are less precise, but i believe that it is a simple fact of low pricing. Technical, these tuners are really strong and smooth running.