Honestly Marina I think you will find it'll work. Just please don't give up if you're not hair free in 8 weeks which is basically what the bumpf sort of promises you. We're all different and you might find that within 8 weeks you are hair free but if there's little change in two or four weeks keep going. I'm as cynical as they come with all these hair zappers but if I hadn't taken the plunge with the Silk n Glide I have, I'd still be saying they don't work. They do.
Maybe TMI but I haven't shaved under my arms for months because I don't need to. I'm still zapping my legs probably about once a month but my legs are much better. I tested it on my forearms, largely because I could really see what I was doing and now I really do need to keep going on my forearms because I've very little hair left and to me it looks worse than it did when I started lol. I only do my arms in the depths of winter though because of sun exposure so its a bit of a slow process.
Good luck!! Hope it works for you.