My boyfriend and I had a lovely time at Hida Gasshoen.
It is a bit far from Takayama main center but you can ask the ryokan staff to pick you at the train station if needed. It is located near Hida Folk Village, and the area is really nice looking and quiet.
Our room was very clean and comfortable, japansee style but with it's own mini bathroom. We spent a peaceful evening in it and slept well.
Breakfast was nice, a funny mix between japanese (rice, fish, pickles, miso soup..) and european food (pasta, chicken nuggets, salad...).
Overall we definitely had a pleasant stay in this hotel for a decent price, and if you don't mind being a bit far from the center of the city, go for it !