This was awesome. Ryan, our guide, could not have been more genuinely excited during our trip as we navigated to find a recently discovered ice cave, which was truly incredible. Upon hopping off the helicopter, Ryan helped the group gear up with crampons and then we hiked around the glacier, stopped for a couple pictures along the way, and found the incredible cave. We were so far into the cave that the only color you could see was blue. While pricey, this was the highlight of our 5 days in New Zealand. Highly recommend.
Depending on your itinerary, book this early in your trip so that you can come back another day. Our trip was in the morning and we were fortunate to be able to fly, but folks in the afternoon were not so lucky and had their flights cancelled.