Definitely works…but be careful!
"DISCLAIMER: this is just MY personal experience with the device after using it for about five years. I would definitely recommend using this on a dry back only! I used it a few times wet, and let’s just say my shower looked like a horror movie, and I have a decent scar where I cut myself. Also, the blades are extremely sharp, so if you have sensitive skin, you will probably see some cuts and bleeding. Aside from that, I recommend the product."

