Bed of nails

So here is my new instrument of torture. It's an acupressure mat which is meant to improve circulation, heal back and neck ache, aid sleep and make the tea (well that would be nice..!).
I don't know that I will keep using it but it's kind of an experiment.
R says it's rubbish and won't even try it out, thinks I'm mad. Takes one to know one I say!