We wanted a fully organic, non toxic mattress for our 16 month old son who hates the crib. After a lot of research, we decided on the Naturepedic Verse mattress. We love it so far - beautiful quilted top, comfortable mattress to fit the sprout kids floor bed. The reason why I gave 4 stars is because - our mattress contrary to other reviews was not too hard. It sank quite a bit when I placed my hand with firm pressure and even when my son who is not very heavy tries to stand up on the bed. I was a bit afraid to let him sleep alone but then he seemed comfortable I wanted the mattress to be really firm as recommended for small children. But that said, it is quite comfortable for an adult to sleep in with the child. It is a good buy and I would recommend it over other similar mattresses.