Review: Ecosa memory foam mattress for someone with limited mobility

To my regular readers: this probably isn't of much interest to you.  I'm putting it up in the hope people with health issues similar to mine will find it whilst investigating if a memory foam mattress is suitable for them.

About me

I have severe CFS/ME, meaning that I am very weak.  I spend a lot of time in bed (20-21 hours per day), so a comfortable bed that minimises back pain is very important to me.  I use a bed pan (on my own) a few times a week and occasionally am too weak to roll over in bed and need my husband to help turn me.  I try to do lying-down exercises on my bed three times per week.  I'm very sensitive to stimuli of all kinds (including touch) when I'm tired.  My ability to control my temperature is compromised so I can easily get too hot or too cold.  I weigh around 110kg, my husband weighs around 85kg and we sleep in a Queen sized bed.