I have 4 watches (an Oris, an Omega, a Montblanc and a JeanRichard), all different sizes and shapes, in this quad winder.  When I first plugged it in, the rotating winders made a scratchy sound, and I was on the verge of unplugging it.  Then I noticed that there were silica packs behind each of the winders.  Once I removed those, the winder became whisper quiet.  I have run it for several weeks now, and all of my watches are wound and ready to wear!