Fantastic. The tour itself took about an hour. The lead guide was incredibly knowledgeable, and really made the experience fun. Our coach came off the road on the way to the tunnels, so we were quite late getting there, but we were still welcomed and given a very timely tour. We were able to use the facilities and then go straight in after the safety talk. So accommodating, and definitely worth the trip. It was one of the guides first day, and we wouldn't have known if he hadn't told us - he took our lateness and group dynamics in his stride. If it is really snowy, I would recommend sunglasses for when you leave the tunnel, as this was a real shock to the eyes after the darkness of the tunnels (we were given an experience of pitch black and told about the long term effects of 'cave blindness' in the tunnels, but got a sense of snow blindness when we left). Definitely worth while and informative experience
