These guys were on a radio4 show a while ago. It actually sounded like quite an experience to have one fitted.
I get the points about "just carry a compass" but you cannot "feel" a compass 24/7. The way it was explained is that it was like acquiring a new sense, like an
It is an experiment into simulating a new sense rather than a "reading from a device".Why does he need to know where North is?
He does not look like somebody that ventures beyond the boundaries of his city.