This is a very big decision to make but if you have problems with birth control pills, the shots, etc, I recommend it. My doctor made me wait 1 year before he would do the procedure after I told him I was considering it, and I have no regrets. After years of trying various methods of birth control and spending a fortune on pills that made me sick, a shot that made me sicker, this seemed like the best way to go.
Drawbacks for me--my cramps are definately worse during my menstrual cycle and its much heavier. I was told by my doctor that this could happen, and it did.
My husband would not even consider it, unfortunately.
Overall, its nice not to worry about getting pregnant again. My last 2 pregnancies were high risk and there was a lot of worry. This was definately a factor in my decision.