My personal experience of the implant (implanon) a few years back was horrible. I was initially put on it because my mum was worried about the fact that I was having no periods/very few (I was later to be diagnosed with PCOS), so I had this fitted - I bled VERY heavily for about 3 months solid, constantly. Then the GP try and put me on the pill to stop that, but it turned out to be the wrong pill to do so (probably not strong enough, perhaps), so in total I had constant vvery bad bleeding, feeling miserable because of that, it also messed with my moods a lot, constantly very tired, gave me occasional very bad headaches etc (to be fair, I think you'd feel tired if you was bleeding as much as I was), so I got it removed. I'm on the Loestrin 30 pill now as microgynon was no good to me. I am probably just really sensitive to the hormones or something, though.