I read the reviews and thought it couldn't be true for such a ridiculously low price. The mattress took a little bit longer to deliver than was projected; but so worth the wait. When it came out of the box it immediately grew 9 inches in a matter of minutes. There was no foul odor as some reviews had stated but sprinkled a few times with baby powder; the instructions clearly stated NOT to remove the cover until the mattress is fully expanded. I had my old box springs from my old mattress and placed it directly on top; will wait the recommended 24-48 hours before actually sleeping on it; but I am truly tempted because it already feels so comfortable the touch. The warranty that comes with the mattress is from Rio Home Fashions in California and covers such brands as "purest", "IDEAL COMFORT", "dream cloud", "ANNE GEDDES", "EUROPEUTIC" and several other name brands. The added $128 Memorial Day Sale price with free shipping makes me one smart shopper. I have been an "Overstock" customer for more than 8 years and am always happy with the savings, value and service I get as an Great Offer Stock member.