I bought a super king 10” memory foam Mattress 6 years ago after spending a fortune on premium spring mattresses which provided little help for night time comfort. The relief for my back & hips was instantaneous. I was a side sleeper but can now sleep on my back also. I bought a double for my spare room & all guests comment how comfy it is. I’ve now replaced my super king with another Hypnia 10” and probably should have after 5 years. Bought in sale again. Best £250 I could spend. The protector cover is better than 6 yrs ago. It’s true what reviews say - it’s warmer than traditional mattress but we put a woollen protector on ours which helps. it gets hard lump in middle where no one sleeps & it gets squishy around the edges if you sit on edge of bed too much like I do! But this is a truly excellent mattress & at affordable price you can be replace every 5 years. I highly recommend. Excellent service. Quick delivery. Repeat customer.