Anna's place is neat and clean, she provides good shampoo, conditioner and body wash.
Near by there are 24hrs convenience shop.
3 mins walk to Higashi-Shinjuku Station (Not a convenient station)
15 mins walk to Shinjuku Station (That the station you want to go around the place) during winter the walk is fine but I am not sure about summer time.
Around 10mins to Shinjuku area. Movie, VR, Food etc...
Overall the stay was nice and I would recommend to stay if you dun mind the walking.