Absolutely worth a stay!
The host is very quick to respond via written communication and the breakfast is quite decent. The room is far roomier than I expected and it was one of the nicest I've seen. It was definitely more of a private room hostel feel than an Airbnb. There were little touches around the room than made the stay very pleasant.
I would recommend that they place some stickies on some of their amenities so it's easier for non-Japanese people to understand. Most of the time it was a guessing game for me when pressing buttons and flipping switches.