On a scale of -5 (uncomfortable) to 5 (comfortable) I would rate it a 1. it is firm, neither uncomfortable, nor significantly welcoming/enveloping. It's a functional & durable firm mattress. It looks impressive, and the cover is high quality. The mattress I received was 2cm over the advertised thickness - 27cm, which just adds to the impressiveness & value for money. After a lifetime of soft mattresses it was a shock to lose the cocoon effect, and to only receive wrapping from the duvet around me and the comfort I had to make for myself with that. However after slight delay I managed to fall asleep on my first night and had a very good nights sleep. I recommend it for its value-for-money, although obviously there are more comfortable mattresses out there which probably cost more & don't last as long (i.e. being single-sided) - if comfort is your primary concern.