Top critical review
It's ok but not great.
on 11 April 2016
Bought one of these a few years ago and it worked ok at first, although it doesn't keep my watch fully wound - the watch has a 40 hour power reserve when fully wound and this winder will keep it going for a couple of weeks but it eventually stops. I suppose it depends how much movement your watch needs to keep it going. So I usually have to wind the watch manually to top it up when I take it off the winder. But at least it keeps it going between wearings as long as I don't leave it off for more than a few weeks. And it keeps the watch mechanism moving which is supposed to be a good thing. It would be better if it reversed direction automatically though.
It is not totally silent but not too bad, although if you had it next to your bed you might notice it.
Since purchasing I have had to carry out maintenance several times! It is easy to take apart and replace the rubber drive belt (I have done this twice, replacement belts are cheap on ebay). Also I have had to take the gear case apart to lubricate it as it seems to be full of thick grease like Vaseline which seems to become sticky over time and stops the motor. Cleaning it up a bit and applying thin oil seems to do the trick. The little motor is not very powerful so slipping belts and sticking gears will cause problems.
Overall, its ok and keeps my watch moving which is why I bought it. I paid £17 for mine, currently seems a bit expensive at around £30 for a plastic case, tiny motor, nylon gears and some simple electronics.