I have not taken Yaz yet but i am thinking of switching. I am not happy with the one i am on (kariva). I have crazy mood swings and bad pms and the longer i am on my curent b/c it gets worse and worse. Everyone is different as to how our bodies react to the birth control. I couldn't take Ortho Tri cyclen lo cause it made me gain a crazy amount of weight and it made me feel bi-polar cause the mood swings were unbelieveable. But others have no problem with it.

I have to take my b/c in the evenings cause if i don't it makes me sick. I too take mine at 7PM. I don't think it matters what time you take it as long as you take it at the same time everyday.