"i have had implanon since april 2010. at first i had very crazy mood swings and i have gained about 15 lbs. the second month i had it i had a period lasting about 2 and 1/2 weeks but since then my mood swings have all but disappeared. i have less acne, i have not had a period for 7 months which is great, and i have not gained more weight. i love not needing to worry about taking a pill everyday at the same time and still getting a period. it was easy to have put in since they numb you but you do have a large bruise for a week or so after but i would take a small bruise over an accidental pregnancy any day. i also like that it lasts for 3 years."