Our no turn super kingsize mattress is well overdue for replacement but I am not sure whether to go for two linked single mattresses or a normal full sized sk mattress. When we bought our current mattress from MFI - remember them ? - we specifically bought a no-turn as recommended by assistant, due to size and weight of mattress. However, I now think I should get something I can turn regularly for health,hygiene and comfort ? Any experience of two singles ?