I got one of these last year on ebay, second hand, took a massive, can't afford it gamble and paid £90. I have been too scared to use it. However, after forgetting my tweezers on hols and getting a full face beard in 2 days 
I thought enough is enough and I dusted it off.
4 weeks in and I just want to cry with joy. Seriously it is that good. Have been using it on my chinny chin chin and my problem patches (about 2p sized 
thick dark hair on pale skin) are virtually blasted into oblivion.
I just wanted to share. I think it would lot of patience and time to do your arms/legs etc but it was worth it just for my face. 