The October issue of wood magazine tests 12 sanders, including the Festool ETS125. I don't find testing sanders that exciting, but one item interested me. The Noise Level measures. The Festool ETS125 was 5 db lower in noise than the NEXT "quietest" sander. In other words, the next "most quiet" sander was 3 times as noisy as the Festool. The average noise level of the other 11 sanders tested was 7.7 db (5.89 times as loud) greater than the Festool. More noise almost always equates to a poorer design and vibration. Plus you have to listen to it.