great little device [SEP] i just got this today and couldn t wait to try it i only charged it a short time i was very skeptical about buying one that s so inexpensive my nails were badly damaged somehow and had deep ridges and bumps on the surface i really wasn t expecting it to do much wow was i wrong my nails aren t perfect buy they re so much better and whiter than they ever are it seems pretty well built and durable i love that it s lightweight and portable you definitely can t beat the cost don t hesitate buy one