I have the device have now approximately 4x used for the underarms. I always troubled something if it flashes. In some places, it feels like little pinpricks, but keeping it out! I found the lasers of the legs in a medical cosmetics Institute is not so noticeable and noticed nothing. When the hair had apparently grown back, a lot of hair have failed. It's not all gone and it's probably also the fact that you never get caught all places. That is the main problem that I see on the device. The treatment area is small and what is not useful, that the lights around is also an edge. So one must always take into account when placing it. I have the treatment intervals held longer, as it should be worth more to catch as many hairs. So the cost of new bulbs remain as low as possible. It should be noted that the device works best naturally good at as "straight" sites. You could ever get impatient when the unit 20x at the edges of the shoulders refuses to work because the contact surface of the lamp is not completely covered. It is not practically anywhere. Nevertheless, I would buy the device again, as the treatment is carried out at home and is less expensive than lasers. The device could be a little cheaper but happy, because the lamps cost yes continuously money again.