Hi there, I switched to Yaz back in August after being on Apri-Oral for 2 years. The first week I had the normal transition stuff...overly emotional, sore boobs, etc. After that, everything was fine. I am on my fourth month of Yaz and I like it better than Apri. I gained weight on Apri and Yaz has taken some of that weight off. My periods are a little strange on Yaz, though. One month it will be lighter and only 4 days, then the next month I will have more cramps and have a longer and heavier period. I figure my body is still getting used the pill, but either way, I'm not really complaining. It's no worse than when I was on Apri. I like Yaz a lot.