I was traveling out of Japan and needed a place to crash in Tokyo from mid-evening until early before dawn the next morning. It was a chilly November night and Guest House Sensu was perfect for my needs.
First and foremost, I was arriving from Narita and leaving out of Haneda the next day. The guesthouse is off of a subway line that's a straight-shot one-hour train ride from Narita (with just one easy subway connection) and then a couple of stops on to Haneda. On top of that, the walk from the subway station is only about 5 minutes.
I had booked a spot in a women's dormitory and was so happy to find that each bunk bed was like an extremely private and comfy fortress. Each enclosed wooden bunk comes equipped with plush pillows and blankets, a personal lamp, a power outlet, and a privacy curtain at the foot of the bed. It makes it very easy for one person to stay awake reading/watching TV/whatever without disturbing the others in the room.
The bathrooms are very clean with excellently pressurized and very hot showers. In the common areas you'll find cozy Japanese-style seating, a traditional tea room, and loads of anime DVDs available to watch. There was also a kitchen and laundry facilities available, but I didn't have a need to check them out.
I arrived at the guesthouse late, so all I had time to do was have a quick dinner at a Japanese BBQ restaurant a few paces away, take a relaxing shower, and crawl into my warm, fuzzy fortress.