@IdealWorldTV Bought the Dormeo Duo Feel King Mattress 18 months ago with a 15 year guarantee....It has become non supportive and totally uncomfortable to the stage it is giving us (myself and my wife) problems sleeping on it as we can feel the base of the bed through the mattress as the memory support of the foam has almost gone and so there are dips that are not recovering....complained to Ideal World and sent photo's of the defective mattress....was told "The thickness of a mattress can reduce by 5% to 15%. Such a reduction in thickness is considered normal". This mattress is now for the bin the warranty guarantee is useless....AVOID AVOID AVOID !!!