Vienva Birth Control

I recently just got put on birth control by my dermatologist for acne. I am also sexually active, but my doctor didn't ask if I was when prescribing the birth control. Also when I got the prescription I looked up reviews and there were barley any. And if there were any they were all bad. 1. Has anyone ever been on this birth control and how is it? 1. Is the birth control just to help acne? Should I be on something different since I am also having sex?