This product is great, it does what it says.
LEGS: everyone is different, so hair growth rate will be different for everyone. In my case the hair grew back pretty slower than normal, after about 3 to 4 weeks they grew back. I did however notice that I got a lot of in growing hairs, the skin feels a bit rough, but regular exfoliating saved the rugged skin thank god! The first time I used the epilater on my legs it did hurt but the pain wasnt as bad as everyone makes it out. The second time, pain reduced. You will notice that the hair gets thinner, and there are areas that hair takes EXTRA long to grow back, which I think is a good thing.
ARMS: I haven't tried it on my arms....yet
UPPER LIP: omg it kills, better off threading. Plus epilating skin on the face it not really a great idea.
UNDERARM: This part made my eyes watery but i still carried on!!! :D it hurts alot here because it was my first time. The skin ended up having very small red patches, at first i thought it was bleeding but it was just little red dots. Second time: LESS painful that before, (still kills, but worth it) the hair grows back REALLY slow, and REALLY thin, you can hardly see it even after 3 weeks because it is so thin.
I would definitely recommend this, the noise may put you off, another issue is that the plug is not the regular '3 stick plugs' the epilator has 2 'sticks' on the plug instead and you need to purchase a convertor or whatever its called.