I was on it for six years and never had any problems. I really liked it. I stopped taking it when DH and I got married, which was in June of 2001. Now we're expecting our first baby!
I loved it too especially not having a period. However, I gained 13 pounds the first year when I was on it and 8 pounds the second year. Took about a year for it to clear out of my system and another 6 months for the weight to drop off.
Yep, that happened to me and I loved it! It was wondeful not having to worry about it every month. It took about 6 months after the last shot to get really regular again. It's wasn't bad at all, though.