I have it. Not really any side effects but it did kickstart my period lol I was just looking for a safe and effective form of bc while im bf.. Pills were out of the question cuz thats what I was using when I got pregnant lol when they gave me the shot to numb my arm, THAT is what hurt, you dont feel them put the thing in but u def feel it the next day (really the next few days, it stays sore for a while) and bruises...maybe they just did a bad job putting mine in haha but its really effective so its worth it. Actually oh and I have yet to dtd so I guess I got mine for nothing..ugh.