My son is 16 months old and we have used g-diapers from the beginning. They work great for us and we've saved a ton of money. They have generally been great at preventing leaks. Although, at times our son has managed to pee through his pants without ever getting the diaper wet (is that just a boy thing?) and we did go through a month-long period when he was between sizes so there were lots of leaks. The biggest obvious downside to them is that I have to do laundry DAILY, but we knew that when we went with cloth diapers. The cost savings are real. We have friends who are having their second child and spending lots of money "stocking up" again on disposables again. Fortunately, we have ours neatly folded and ready to use again. We also use the disposable inserts when we go out of town (or when I've been lazy with laundry) and they work well. It's nice to have the option. In general disposables give our son diaper rash quickly and it's no different with the gdiaper inserts, so we try not to use them too often for too long.