We stayed at Yamadaya for 2 nights, and our experience there was absolutely fantastic. The environment, service, amenities and food were perfect.
There are a total of 14 rooms across 2 floors at Yamadaya. Our room was located on the 2nd floor with a great view of Mt. Yufu. Basic amenities are included in the room (tv, wifi, plug point, towels, toothbrush, razor, shower cap, face wash, moisturiser, etc). Toilet seats are heated and have bidets. Other than that, there's a green tea set you can use, hot and cold water to drink, and also Yukata and pyjamas to wear during your stay there.
There are 4 onsens at Yamadaya, 2 private and 2 public (indoor and outdoor). As long as nobody is using the private onsen, anyone can use it. Toiletries are of high quality as well (Shisheido brand). I highly recommend the outdoor onsen by the garden as it is really beautiful.
Food was very delicious. Ingredients were fresh and prepared with care. Both nights we were served with a variety of food. The highlight was definitely the beef. I would recommend to have a light lunch as the dinner portion is really huge and you will be stuffed!
Lastly, the staffs there are really polite and friendly. They'll go the extra mile to make your stay there as enjoyable as possible.