This is the first mattress I ever ordered online. I did so based on the New York Times Wirecutter recommendation.  I was a little afraid it might be too soft for me as it is a memory foam mattress and the word "foam" always seems to indicate softness to me.  It arrived in a timely fashion and I was able to install it with no problems.  The mattress is very nice and medium firmness which I love.  I am very pleased with it! I only wish they sold sheets to go with it, although I had sheets which fit it just fine.  Great purchase!!