It is a great and historical onsen to stay in. Everything was traditional and the staff were very friendly and helpful. We dropped off our luggage early and they were in the room by the time we checked in. They provided a very tasty mochi snack initially. The dinner and breakfast were amazing, not to mention the excellent services.
Onsen were great too. You can reserve private or use the public ones. When we visited, other people used private ones more often, and we had the public ones to ourselves.
This is the place to go if you want to experience a traditional onsen and hotspring experience. But if you are looking for a more modern and accessible ryokan, this might not work for you. The place is big and depends on where your room is, you might need to walk down 1-2 floors and a hallway to get to an onsen. You don't have a private restroom and it is shared with other customers.