When I first bought the product, it didn't work at all.  I unplugged and plugged back in, blew in the connection port, all the tricks.  What finally worked was licking the end of the power source that goes into the winder, don't ask how I arrived at that.  For a couple months it worked fine for the most part, although I had to use this little trick a couple more times and then one day, (about) 8 months after purchase, it died all together.  The winder wouldn't work and then randomly started again after around a week.

The product is not only a gamble on whether it will work or not, it also feels cheap, especially considering the price.