friendly helpful staff, luxurious onsen, comfortable beds in a spacious room, great location for exploring Hakone, games and toys for kids, lots of books in various languages for readers of all ages, delicious snacks and sweets, generous open-bar happy hour(s), and an excellent, excellent breakfast —I travel fairly often, and Hakone Yutowa really was one of the very best hotels that I’ve ever stayed in.
My only suggestion is that they might consider adding a fitness room.