We have only had this mattress 2yr and are already looking for new. The "normal breaking in" that is not covered by warranty includes body impressions (giant holes) that are 4 inches deep in some places. It's heavy when trying to change sheets, hot, and was only comfortable for about the first 6 months. Wish we still had our previous mattress that was awesome (Serta) but we switched from Queen to King.
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