I saw one for the very first time and I questioned DH, "really, I don't want lint in my dough?"
DH found them at the junk that his mother buys and never used. Maybe she saw her mother using it but even DH do not remember her using it when him and his siblings are growing up.
Anyway, now I got one and I don't know if I wanted to use it. DH wants me to use it because he complains about the flour all over my pizza dough. He said, "I hate biting the pizza when flour falls off from it." So, he is for it. As for me, I worry about the lints...:)