This is a great place for quiet. The onsen was wonderful. The food was new experiences. The staff including the chef were friendly and helpful. The room was charming (view so-so). Lovely base to see Mt Fuji. Loved the open air museum, museum of art and museum of photography.
BUT - "private detached bathroom" actually only means an en suite toilet and sink. No shower or bath. For that you have to go one floor down to the public onsen (which is reservable only from 3 pm, so if you want a private shower before that, or, after you just have to be lucky that no one else is using it.
BUT the staff spoke practically no English and we no Japanese. Nor did they seem able to use a translation programme (like Google Translate - we made communications which they read, they responded in fast Japanese)
BUT if you have disability issues, transport is HARD in Hakone (no taxis/ubers etc available before 10 am in the morning at all!). The day we left however, one of the chefs was kind enough to give the three of us a lift to the bus stop (two large and two small suitcases and mother in wheelchair). Hakone is also very steep gradients