I hated it. I had it for about 6 months, maybe a tiny bit longer, and in that time, my bleeding was reversed as what i had it normally, so i had period for 3 weeks, then a break of about 1 week MAX, then bleeding. It wasnt HEAVY bleeding all of the time, maybe for about a week, then light bleeding the other two weeks. It was hell. And like sunflower, or similar, i got pretty depressed, i personally think it had a huge contribution to my depression and agoraphobia.
I did gain weight, but i personally liked that, i was a size 7 pre implanon, after having the implanon put in i slowly gained weight to be a size 9. More womanly figure that i just loooved.