We had a Sterns & Foster for maybe less than 2 years.....it was HORRIBLE.........talk about buyer's remorse!!! It was so difficult to sleep we had to replace....our bodies felt like we'd been in a car wreck each morning!!
We had purchased a SERTA at the beach house and enjoyed it so much we just bought the same mattress for Nashville....it is excellent.....
Explored foam mattresses last year.....just couldn't get comfortable with the potential toxicity issues......
Good Luck....I will say that obtaining the Serta's have been the best mattress buying experience we've ever had.....previously for us it was ranked down there with "root canal"
