What's good: Very clean air, quiet, relaxing. The hotel provides a lot of toiletries. The bath tub is clean and good for getting a good soak. The Lake View Farm nearby has ice cream, pastries and an open area with garden tables and chairs, a goat Yuki who's quite tame, rabbits in a hutch and a pony or horse. There are also gear to play badminton on the lawn.
Not so great: It really is far from Lake Toya and the free transport from Toya station will really help (estimated taxi fare: 5,000¥). Didn't see any bicycles for rent at the hotel. The fireworks look really small from the room as well, and at night, it's hard to see through the glass windows and you don't want to open them as insects will get in.