Etonogestrel
"My first implant was amazing with no bleeding or problems really. Only time my hormones were up the spout was when I would have actually been due a period. 
My second implant however is a total different ball game, I've had random heavy painful periods lasting for 2-3 weeks, and also gained nearly 2 stone in weight which I have tried every possible way to get rid off but can't.
I'm having it removed next week and going back to the pill with the advice of my nurse and with the hope I can shift the weight gain. 
I constantly feel miserable and have no sex drive what so ever.
The pill is less convenient as you don't even need to think about the implant once it is in, but I can't live feeling how I do!"