I have been using it for a week in total since I bought it, and everything is satisfactory. I would say that it is an excellent machine considering the price.

In terms of smoothing, it is an excellent disc BUT it is probably not well balanced because when I put it on, the entire wheel vibrates excessively. If you want to sand something for a few minutes, it's fine, but for me, who works with the wheel for about an hour and a half a day, such vibration destroys my hands.