If you want to use a shop bought kit - ive read good things about this-
Google it for hundreds of reviews, but overall they are pretty good. I'm considering buying it for my legs, but waiting till winter time (you need to keep out the sun)
I have been using skin clinics for my underarms and its brillint- http://www.sknclinics.co.uk/skin/rf/find_openday/
- they have an open day on the 15th, where you can get a free test patch done. I'm £90 a session for my underarms, and will probably need 6 sessions (due to hairgrowth stages). I'm using my tesco clubcard vouchers to fund it, its paid for 2 so far, nearly got enough for my 3rd now.