Pro:  Keeps my watches wound and dust-free when not in use.  The transformer (wall-wart) seems energy efficient: it is not warm when the unit is inactive, and the input-to-output ratio is good too.

Con:  The unit arrived in great, intact Amazon packaging, but the edge of the silver portion near the base was chipped when I opened it up.  Likely a damaged unit sent out by the manufacturer- poor quality control, I suppose.

Other Thoughts:  Like the product, but not that I received a damaged unit.  The product is a little bigger than I realized it would be- about the size of a quart of milk (though tilted at an angled).  I also had to add some links to my one watch band, as it would not fit on the holder for this winder: Not exactly universal.  It's not silent (like some reviewers claimed), but the muted whirring sound isn't bothersome-  hasn't been in my bedroom though, so I cannot comment on whether it would disrupt sleep.  Waiting on replacement unit to arrive from Amazon- will try to remember to comment on state of the new unit.  Thanks Amazon for a great return policy!  They were even willing to absorb the cost and have UPS pick up the return package from my home; but, I am returning some other holiday purchases which did not have free return shipping, so I opted to just drop it off at UPS with those items.