Pretty good quality for the price. I think 2.5 RPM is a good RPM that most cup turners use. I was able to build my wife a wood lathe in a few hours and it works better than the metal lathe I bought her from Revain for $35. She was able to leave it on for over 12 hours and it still works fine. The engine gets quite hot, but not hot enough to burn yourself immediately. I would definitely buy them again.