Here is my follow-up to an earlier post. My son is 19 months old and definitely too young to switch to a big boy bed. This is the greatest invention ever!! I am now able to sleep soundly knowing that my baby cannot get out of his crib and run around the house. It took a couple of days for him to get used to it, but is once again sleeping soundly through the night. I recommend this product to all new moms who have a "fish out of water" like me!!