Great tour, although the pick-up point was a bit crazy. It would have been good if each of the guides had a sign instead of everyone having to ask Are you xyz tour.
The local guide at the mine was great and able to answer a wide variety of questions. I liked that we had headsets - it made it very easy to hear the guide.
The elevator to come back up is not for the faint of heart or the claustrophobic ... my lord, I thought I was going to die!
Good amount of free time to shop and use facilities.