I have been on Yaz for about 6 months now...switched from ortho lo. Here's my experience with side effects.
No weight change
No breast tenderness
Isn't causing dryness vaginally
I still have some nausea and sleepiness, but it got better when I started taking the pills closer to bed time.
Moodiness level isn't terrible, sometimes I get moodier than normal, but hey I'm a girl!!!