Implanon
"I had Implanon inserted in August 2010.  I've been pretty impressed.  I was horrible at taking the pill (didn't always happen every day, much less at the same time) so just the fact that I don't have to remember anything for three is enough right there!  I usually have my period for a couple of days every other month; I usually don't know when it is coming which is annoying, but it's always light so not too much trouble.  I haven't had any weight gain but my breasts have gotten a bit smaller.  No unusual mood swings either.  I would recommend Implanon to anyone who wants a no-hassle birth-control method.  Oh, also, Implanon was only $45 for the copay and device."