I bought this mattress after having really done my best to research memory foam. Apparently, in order to get the highest quality/durability, you need to get 4 pounds and up. 4 pounds meaning one square foot of the mattress weighs 4 pounds, so it has a high density. I chose this brand over Serta because the Serta selection available on Great Offer Stock at the time was slim and none were 4 pound density or over- this one is. I was worried because I had never heard of this brand and the reviews were vague, but I'm here to say it is excellent. My husband usually prefers a softer mattress and I prefer firm, but he is even very satisfied with the mattress. Before this one we woke up often throughout the night and were both often stiff and sore. A few reviews mentioned a strong smell and said it would take a few hours for the mattress to unfold to be flat and expand to its full 10 inches. I did not notice an odor and the mattress looked to be flat within 30 mins or less, however we gave it a few hours for the heck of it.