Bd, you have to remember every woman reacts differentally to things. Some woman are lucky and get no period and the experience is great. But for the majority of people I know who are on it (and I do know people on it and love it) they have had the worst side effects from it. Lots of bleeding, hair loss, weight gain, arthritis, decline is sight, depression, you name it. I cried everyday for 6 weeks on it. So much I had to go home, I couldn't even talk to anyone without freaking out. Which led everyone around me, esp. My boyfriend because it was partly his idea, to feel horrible as well. Thank god he told me never to get another shot or else i'd probably still be on it out of my own stupidity. My body didn't like it. Some people's do.
There's a reason norplant was taken off the market. And this is basically the same as norplant was.