Hi We think that we are about to buy a JR 'Luxury' bed (medium, I'm 12 stone (5'8") and my wife is 10 stone (5'10") Our friends bought a Vi-Spring Shetland; they find that it feels really luxurious when they have just turned it, but that quite quickly it 'nests' and feels a bit more ordinary. Do you think that the more or less monoculture of wool in the Shetland is what causes this and would the multiple layers in the JRL keep the lofted feel for longer. We've had a mattress that 'nested' before and didn't enjoy it.