I love our Serta mattress! I purchased a Serta brand crib mattress over seven years ago when I was expecting my first child. Since that time, I have had a second child. Both of my children have slept in the crib, using the same Serta mattress. The mattress has held up every well over the past few years. Even after this amount of time, it has not changed shape and it still remains sturdy. We keep the mattress covered with a mattress cover and a fitted sheet, and it still looks brand new. Both of my daughters have had restful sleep on the mattress and it continues to function very well. I would definitely recommend a Serta mattress to others and will plan to purchase more Serta mattresses in the future for beds.