This mattress started to sink after one week. The other Serta we have is over 10 years old, but has held up like new. We bought both at Sams, and they were about the same price point, but I guess we got a better mattress back then for that amount of money. We actually didn't consider that until after the fact. We are also a bit larger now, so we will look into a higher end Serta mattress. We have owned many Serta mattresses over the years and have been pleased with all the others.