Good value for money. The neighbourhood is great, with lots of nice shops, restaurants and places to drink. And it's quiet. Close to the bus stop and not far from Hatagaya train station. Be careful, though, when coming home, because many of the trains don't stop there! Twice I ended up in Shinjuku then had to double back on the regular Keio Shinsen train.
The place is dark, as it doesn't get in any natural light from outside as it's surrounded by other houses. And it has just about the smallest bathroom I've ever been in and an old toilet. It's Tokyo, though, and space is at a premium. It's good as a place to sleep if you're out all day.