I purchased the Serta Firm Queen Mattress. Overall I'm very happy with my purchase. I was debating on getting the softer one, but after reading the reviews for that some people said it was too soft. I figured if this bed was too hard, then I could buy a mattress topper. It did take some getting used to but I am now getting a good night's sleep almost every night. The delivery guys were great and brought it up the stairs for me and took the plastic off of it. The only downside is that you can't flip the mattress over. I knew that when I bought it from reading the other reviews but decided to buy it anyway because of the low cost and $1 shipping. Overall a great buy!!