Definitely one of my best tour experiences. Shoyo - our tour guide - is very knowledgeable and kind. Yumiko is also quite responsible and accommodating. They offer snow jacket, food, oxygen if you need it, hot drinks when it's freezing cold after the sunset, and most importantly, very professional photos for free! Highly recommend this tour to anyone who is planning to go to Mauna Kea. It's less well-known than other tours, but offers better services!