Efficient, little painful, not very expensive, less .... than go to dermatologist.
Small problem, we must insist on the camera button for the cold is appropriate. (It's got a little crackling in contact with the skin). And count a good 30 seconds. Subsequently the area is a little bit painful and a little swell, I invite you to possibly provide a dressing area-that elegantly hide your injury time it fades.
But I do not regret my purchase and highly recommend it.
