Prior to purchasing this new mattress, we had a Serta mattress which was 12 years old. We researched online for different mattresses prior to buying this new Serta. In the end, we decided on another Serta mattress with the pillow top feature. The new mattress is extremely comfortable. We are very glad that we selected another Serta mattress and we are confident that the new mattress will last as long as the old one did.