I used these for years. We had 8 kids and every single one wet the bed... until goodnights. They still had trouble with night wetting but usually never wet through their goodnights. It was great for them and me to have nice dry beds in the morning. No more smelly cold wet sheets to deal with! Then we found out it was a magnesium deficiency, began to give mag. Supplements and didn't even need the Goodnights... but they were life savers until we solved the " why" issue!
My pediatrician recommended this brand of underwear for my son and I have also found this website to be full of information and a great resource. The forum has been useful in letting me talk to other moms in similar situations. If you sign up for their newsletter you can get special coupons in your email.