Mmmhh, I can't help much either. I'm on Microgynon 30 and so far had no issues with it whatsoever. But then again, I can't compare it to anything else, as I've been on the same one for five years now. Apparently it is quite reliable, as it uses two different kind of hormones. It works in two ways: 1. It stops the egg from maturing and being released; and 2. it alters the lining of the uterus (=thinner lining), making it unfavorable for egg-implantation. Thinner lining also means shorter periods (mine is only 3 days, sorry TMI) and also less painful! YAY to that one! Anyway, that's all I can contribute. Hope someone else can add, so you have a greater choice.

Good Luck