One, 23-year-old Hannah Silver, said: "I was a little apprehensive before I tried it but I actually really liked it. It was very earthy and it tastes very smooth.
It wasn't too bitter and the earthiness really came through - probably because of where the beans have come from."
"It is a delicacy so I can definitely see someone wanting to pay £50 for this, perhaps for a present."
A Peter Jones spokesman said: "We wanted to give our customers a really special experience."
