Super convenient location if you want to be close to Haneda airport. Located right above the subway station (noise is minimal unless you're sensitive to sound--you won't have trouble sleeping), and also across the street from the Takanawa Gateway station.
Room is small and compact, which isn't bad if you're planning to be out and about. Has all the necessities in the bathroom. New amenities given around noon every day at your door.
Has two washers and dryers if you're worried about laundry, make sure to have 100 yen coins on you!
Keep a close eye on your key card though, I accidentally lost mine and had to pay 10000 yen to replace it, my fault though.