I came to Gero on a recommendation from a close friend. I somehow missed it when I had done a previous Takayama trip and I am glad I came back. The town is very small and the hotel is easily walkable from the station, some people say 15 mins but it was more like 8-10 mins and that was while stopping to take pictures of the Hida river. Great location for the hotel, close to everything.
The Onsen in this hotel alternate between male and female daily so you will have a chance to experience both outdoor and both indoor ones as well as the carbonated one in just one overnight stay.
I booked online through hotels.com and didn't select the breakfast for an additional 10,000 yen. I assumed I could add it there in cash which was a mistake. When I arrived they told me that to add breakfast it was 27,000 yen, almost triple the price. When I showed them the offer and explained the situation they offered me it for 22,000 yen. I declined because that is still over double the price I could have had it. This was very disappointing but I understand that online has different offers than the hotel. It was my mistake and I regret not ordering at time of purchase, don't make that same mistake.
Hotel is very old, it is still nice but I imagine it was amazing when new. The elevators are so confusing, you will need to take several and transfer between them on different floors to get anywhere unless you stay on the mail floor I guess. You will figure it out but the first time is confusing.