Our new mattress Hypnos luxury earth 5 , seems very comfortable at the moment ( only been using it for one and half weeks) , l would have preferred it to have been a double sided mattress that you could flip over occasionally, but l did not realise until it arrived , so you can only rotate the mattress , this is Benson's specification and l was disappointed with that as it is quite an expensive mattress, we will have to see how it wears.