"i&#039;ve been on yaz for about three years. the first two years, i took the pill for moderate acne. it worked great for my skin (which i cleanse religiously with dermalogica now...if anyone wants a good skin care wash, that&#039;s it) and it did not seem to affect my weight. i&#039;m on the thin side for my tall frame, so a little weight would have been welcome. this last year is when i actually started using the pill as a form of contraception. it has worked very well for me, as in i&#039;m not pregnant, but i have breakthrough bleeding constantly. my doctor decided to switch my birth control. it is a great pill with minor side effects (headaches, spotting, breakthrough, acne flare-ups between packs). the pill works differently for everyone."