Which is a bit scary are the recommendations of uses. These recommendations are in addition to my initial fears: ok it sends pulsed light ... but it destroys only the hair bulb? It reminds me limit to sketch Coluche as lye that only attacks grime. Inevitably there is thought to radiation, the treatment of bodies ... ok this is not the same technology but I was a little worried at first use. Especially because it is not immediate, we must make a first test "empty" to see the reaction on his skin, again the manufacturer is taking no chances and has limited the impression that it covers ( yes I was worried, I confirm it). Compared to my skin the intensity should be set to 5, or strong enough, and it's not there either to reassure me ... It heats and burns a little when flash but it's still bearable. What is "binding" is that the beam must be used on a shaved hair, it does not attack the hair, simply kill the bulb. So you have already shave, and only then use the magic beam. The user manual is very clear and very simple (beyond warnings). The council of "marking" areas treated with a white pencil is very clever. Indeed as the radius has no immediate effect, it is not so simple, without mark, to ensure places where we went. Especially the leaflet says it well: "never go 2 times to the same place ...". The surface treatment is very small, suddenly it takes very very long time to process even a small part of his body. It's long ... After two uses (warning minimum space of two weeks each session ...), the result seems to actually start to appear ... I will continue a bit to see if the promise of permanent hair removal is actually held ... Otherwise I think I would return to a wax treatment, more painful on the stroke but still much faster and with less thought back (even if they are meaningless) on possible effects.