I really enjoyed my stay here. It was actually slightly larger than I expected, and I was happy to see that the sink in the room was private. Having a good WiFi connection was fantastic. The room is musky smelling, and not having a shower nearby is definitely a downside, but it's well worth the very low price and conveniently located to explore Tokyo.
Do keep in mind: the sento nearby is not open on Mondays and is also not open until the late afternoons.