All for IUD's

I've used the IUD for about 5 years now. I tried a diaphragm for a year or so, but had constant UTI's. Could never remember to take the Pill. Plus as a former smoker with a family history of heart disease, it really shouldn't have been an option anyway. Not regular enough for natural methods. I LOVE my IUD. Never have to worry about forgetting, which is a big thing for me. The only con I can see is that it seems to have done a number with my periods (never particularly regular, now i generally have one only every other month, then they'll be pretty regular for 2-3 months, then start skipping again. They're also much heavier for a day or so, but not any longer than before...3-4 days really. Have been spotting lately in between every few cycles. But...I'm pushing 40 and my doctor says a lot of that could be as much related to my stage in life than the IUD. Either way, I wouldn't change it for anything. I have four kids and doubt I'd want to start over if I were blessed to remarry, but not prepared for a permanent solution either.