I purchased one because I saw a lot of people saying that a roller helps spread serums easier, without the absorption into the skin on your fingers. Yes, you don't loose as much product on your hands, but it doesn't spread that easily. I used it a couple times and went back to using my hands. The product itself is ok. As I mentioned, first time buying one and came as described, but the big and small rollers aren't tightly attached, the metal prongs only go into the crystal maybe <4mm, so the prongs can easily come out and the jade crystal can fall off if you're not careful. Packaging was amazing though, i'll say that much. As for price, I think it was pretty standard.