Regarding its use, it is very easy but I must admit that this is not very pleasant especially in the middle of the upper lip. On the side it goes! The first time I did it in an Indian institute and it was also very painful but nickel result. But I can not tell you which buttons I had after (the day after hair removal and for 4 days), it was too ugly.
But I knew there were things to do before and after to avoid those nasty pimples. I confirm that it works very well because I have not even had a single :-): epilator then disinfect with alcohol 70 or 90 °, pluck with then just ask after an ice cube for a few minutes. Thoroughly dry and put a moisturizer - (I put the Cicalfate of AVEN). And impeccable results. Although shaved and no button :-)