I bought this king mattress in August 2019 and I am extremely disappointed. Within a few months it started to sag where my husband and I sleep. It sagged to the point I felt I was climbing up a hill to reach him. When I made the bed it looked like there was 2 big indentations and a hill in the middle. I complained to Wayfair and they were great to address my concerns, and thinking I just had a defective mattress , they sent me a new one in August of this year (2020). However less than 6 months later the same thing is happening. I feel like I am climbing into a hole every night, I wake up with back pain and hip pain. I cannot recommend this mattress and I would like Wayfair to refund my money. Terrible mattress!