Mattresses are hard to compare and rate on line, but I did plenty of research and Wayfair’s site makes it easier to compare.  Good price, quick shipping.  I was hoping the mattress would be ‘quieter’ than my old one, which made a lot of noise when climbing in bed, rolling over, etc.  This is better, but still a bit noisy.  So 4 stars instead of 5.  But still happy!