There is not too much to say about this mattress. We purchased it to replace the cheesy mattress that came with our mini crib. It came within 2 days and looks to be a decent mattress . It fits in our mini crib perfectly. Our baby has not been born yet so I cannot review the long term quality of the product. Our last mini crib we purchased a 5" mattress and that was  the same thickness of a regular size mattress. Since our babies only use the crib for such a short term (1 year) we figured the thinner one would work just fine for her.