Hi A.,
I've had a Paraguard for over a year, and love it. I tried the pill (mini-pill, plus regular pill) and Nuvaring in the past, with poor results (irregular bleeding, worry about remembering the pill, etc).
I really like the maintenance free aspect of an IUD, and prefer to not use hormones. I also plan to have mine removed in the next year or so to have another child.
As for painful/long periods, I really haven't experienced that. I will say my cycle went from about 5 days before Paraguard to 7 days now. However, I'm not sure if that was due to the Paraguard, or just to changes in my body after having a baby 2 years ago. Even though my period is 2 days longer, for me at least, the first day or so of my period is very light, followed by 3 or 4 "normal" days, and one day or so of light again.
Please write me with any questions you have - I'd be happy to chat more about Paraguard.
Good luck with your decision!
A.