3 year birth control plan?

Paige • 🐢💚
Hi there, I've been looking into birth control and one that sparked the most interest for me was the 3 year plan implant they put in your arm? I am 19 years old (20 this year) and my fiancé and I know that we do not want kids for at least 3 years which is why I feel it'd be a good choice for me. I also am very forgetful and feel like the pill would just be a train wreck because I would always forget to take it. 
Is anyone on here currently on the 3 year plan? What are the costs? Is it painful? Is it effective? I would like to know everything! So if you have "The Rod" please don't be afraid to share!!