The rooms were quite nice, but the nature of the walls (thin paper) were such that the manners of our neighbours had a large impact on our experience. On our first night, a couple talked loudly well past midnight, followed by several minutes of *ahem* passion. Drunk people stumbled up the stairs - very loud when you're lying on a mat of the floor.
The staff weren't overly warm or helpful. Their English is limited.
According to one site, you can organise food from the kitchen if you order it before 7:00. We tried to organise dinner at 6:00, but were told "it's impossible".
The onsen was dirty. Very dirty. There is established mould on the ceiling, the walls and floating in the water. I am not a fussy "clean freak" by any means, but it was unpleasant to be in. These are also the only washing facilities available. And if the doors are locked you have no other options.
The location is a bit more remote. There is a bus stop and train station very close, so it is reasonably easy to get around, but if you want more restaurant choices, you might be better off staying in a larger area.
Overall, it was nice to experience something a little more removed and traditional, but I wouldn't recommend this Roman. I would do a bit more research and find one that is cleaner with better service.