I've been on Yaz for almost 2 years now. I love it!! I used to be on ortho tricyclen lo and i got really bad mood swings and it made me gain a ton of weight, so my doctor switched me to yaz. I haven't gained any weight from it, I don't have mood swings or bad pms symptoms anymore, barely have any cramps. The only bad thing is that I have barely any sex drive. But that could be because of other things (long term relationship...bored with it). All in all, I love Yaz!