Pros:
1. Nice clean room
2. Looks just like the pictures
3. Appreciated the amenities provided (shower gel, shampoo, conditioner, toothbrushes and toothpaste)
4. The host is super prompt and helpful.
5. Very inexpensive
6. Almost central Tokyo
7. The train station is a 10 minute walk.. easy access to lots of other lines from Ueno station which is just two stations away.
8. Has a tiny kitchenette, a nice balcony and good WiFi
Cons:
1. The hot water keeps randomly turning off.. if it happens in the middle of a shower and you have to go out of the bathroom to access the temperature control.
2. This is in a former red light district of Tokyo.. so while it's not crowded or particularly dangerous, it can feel quite seedy if you're a woman travelling alone.
Overall, it was very good value for money and the hosts are very friendly and helpful, so I'd recommend it if the surroundings are not a concern.