I bought the Starlight Supreme for my son, and he has had it for 18 months. I have not seen a better mattress anywhere. The mattress is very firm and does not sink in when the baby is laying on it. Most of the mattresses advertised as firm sink in and make me concerned when it comes to his breathing. This is the best mattress and I am purchasing another for my daughter. You don't need a mattress pad because it is already leak proof, and my child has allergies and my allergist told me it is hypoallergenic as well. I would recommend this mattress to everyone, it is perfect!