It was a wonderful traditional Japenese experience.
The dinners were amazing and they were very accomodating to our diarery needs. You get your own dinning space, to which you arrive on time, and dinner takes a long time with many small Japenese dishes, most of which were delicious. The earliest dinner time was 6, so with jetlag my child fell asleep before getting much to eat. The next night, we fed him elsewhere before going to dinner and when he fell asleep at the table, we gently placed him on cushions on the floor, where he continued sleeping while we enjoyed our many course dinner.
Service was excellent.
Sleeping on the floor was an interesting experience - the mattresses are not very thick.
The Snow Monkey Park required serious walking skilles to reach - mostly the first half a mile, which was a steep incline. The weather there is colder. The park is small, but very much worth the climb.
There is not much to see on foot from the hotel. Apart from the Snow Monkey Park (and the delicious food at Enza Cafe at the entrance to the path up), the other main sight-seeing is at Shibu Onsen. There are also Japenese style hotels there, and if you are car-less, I would stay there. Aburaya Tosen is great if you are travelling by car, but I would not bring one into the narrow roads of Shibu Onsen.