Like most people say, she lime fine. What I particularly like is the extremely effective side in the thicker grain. Lime désépaissit nails of my toes 3 times faster than a standard cardboard lime. And, of course, she does not wear (to be checked over time anyway). Storage is perfect to protect it. The surfaces are both concave (hollow) and conform to the shape of the tip of the finger / toe: we like it or not, it depends, but good to know, once she is a little thick on one side which can annoy some.
