Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beware of this winder

This winder is an inferior version of one they used to make, but don't anymore. This winder scratches the inside of the blades of the shuttle and can easily break off the blades. In fact, I was sitting in Lacis with the inventor of the winder, Jules Kliot when he tried to demonstrate it with one of my german faux tortoise shell shuttles. As soon as he started to wind it the blade broke right off! Fortunately, they had more shuttles, so he replaced it then and there. However, do NOT USE this on any antique shuttles or you will sorely regret it! Clover's faux tortoise shell shuttles have ridges where the thread can easily slide between the blades eliminating the need for a winder.