The hormones aren't any different to what you would get in a typical contraceptive pill:

http://en.wikipedia.org/wiki/NuvaRing

A lot of women find that being on a contraceptive pill helps to even out their moods rather than antagonize them. How long did she give it a go for? I guess I'm wondering if her moods could have more to do with something else.

I'm kinda tempted to ask about this, actually. My office mate is on it - and I'd never heard of it before (just got released in Australia last year). I find it hard to remember to take the pill the same time every day... This looks wonderful...