This is a comfortable mattress and the  condition it arrived in was perfect ..but we returned it ( Thanks Wayair for the no quibble 100 day returns)  because it was listed as medium firm but for the 2 of us sleeping on it it was more soft to medium ….to put it into context we are not lightweights at each approx 75-85 kgs ..l found the edge too soft so replacing with a pocket sprung mattress to stop the fear of falling off the edge of the bed .
Despite my personal experience I would recommend if it is for one person or two slimmer people ….would rate it medium firmness at the most .