After 27 years and 3 pregnancies our original firm Serta Perfect Sleeper needed replacing. What a long life! So we looked at other brands. Tested them in stores but finally came back to our tried and tested old faithful. We've had our new firm Perfect Sleeper for over 6 months. If anything, I think this mattress will last us another 27-30 years. Thanks for the quality and a good night's sleep.