As our first experience with Airbnb, we loved it.
The place is perfect if you're in Tokyo for sightseeing, visit and/or party(you can get in anytime, if you're silent), enough room for sleeping for two plus luggage.

The Marunouchi metro line can get you in a lot of interesting districts of Tokyo in no time.

Very nice place for this price, and Van answers by email are very fast.
I know where to go for my next stay in Tokyo!

For people who stays more than a week, there is a laundry place right next to the public bath.