I personally find the product "pricey" but the purchase of this product may be a good alternative to redeem a mouse if you own is good. There are 10 "pads" in the bag thereby equip mouse 2 or to change the pads when they are again used. Nice slides. Priori quality product (we will see with time). Be careful to choose the model of skate that matches your mouse. As for me, the mouse model I own is not referenced, I chose skates that seemed similar but are smaller than the originals.