It's clean, calm, and relaxing! Though the place is next to a few rail lines, they calm down early in the evening, and neither myself nor my partner was kept awake or awakened by night trains during sleep. The neighboring JR Yamanote line proves invaluable as an amenity, as does the in-house, private washer/dryer.
One thing to note is that the futon on the top bunk bed is VERY hard, and may prove difficult to sleep on for some. The bed below, however, is soft and comfortable, and gave me a good night's rest.