I've been using a chinese 15mm polisher for a while. Decided to get a Rupes 15 MKII. Best decision I've ever made. Power is nice, but the biggest difference I noticed is in the finish. With some polishes, I could not get the chinese 15 to finish to my liking. With the same polish, pads and paint, on the MK II.............wallah!! Much better finish! I've attributed the better finish strictly due to the polisher being much smoother and less vibration. Never really put this into consideration, but it makes total sense. Just wanted to share my thoughts.