The implant..

Avani • 20 // San Francisco
My boyfriend and I were discussing the different types of birth control we could use and he mentioned the implant. A girl at my school had it and said it did its job and was 100% effective. Just curious if any of you have it or had it before... Like what the price was for you to have it implanted? Was there any pain when they implanted it? And are the side effects worth it? Or what kind of side effects did you experience? 
I'm kinda nervous but I want to take the implant into consideration so pls any kind of feedback would help!