I have now been on the Nuvaring for a year, and I must say I am impressed. I seem to be one of the lucky ones who has minimal side effects. My hormonally-driven mood swings are gone. I self-lubricate again. I'm not bleeding like the losing gladiator every freaking month. (I'm lookin' at you, Yaz) It works, I don't have to fuss with it except before and after sex, I don't have to remember pills, I don't have to worry about whether I can take my BC when I get sick (with my health, this is a serious concern. I just put it in, set a reminder on my phone to take it out in 3 weeks, and forget about it.
There have been a few slight drawbacks. Once in a while, an average of once every 3-4 months, I spot randomly for a day. Once in a blue moon (literally, it happened once all year) I have breakthrough bleeding. And that's seriously a bitch - I bled for 2 weeks, then I got to have my period ("withdrawal bleed" to be precise). Not cool, and a bit scary the first time, but not the end of the world. Also, the discharge production is up, but that's to be expected - when you've got a little ring hanging out up in there 24/7, any self-respecting mucus membrane is going to get a bit fussy. Again, no big deal, whoop-dee-doo.
If I had to really nitpick, the one thing that bugs me is that I HAVE to take the ring out for sex. I have a bitchy, whiny cervix, and she freaks the hell out if something even remotely pointy (i.e. the folded ring) trespasses on her domain. Seriously, that bitch is crazy.
Overall, I'm very happy with the Nuvaring. I can definitely say that I recommend it for anyone who has side effects with other birth control pills - it's the lowest effective dosage available, and being able to stop taking a pill on the clock is nice.
This month, I'm starting my second year of Nuvaring. Here's hoping that we have another good, side-effect-free year.