I had the best possible experience with this apartment and I would definitely recommend it to everyone looking for a reasonably priced place at a good location. It was about 8 minutes walk from the station and the neighbourhood was really lovely, full of restaurants and shop. There is also a big Seiyu grocery store where you can buy everything you need. You can also use a portable wi-fi which comes quite in handy if you don't know your way around the town.
Kimmy and Dee were very helpful and fast with their responses and the check in/check out process was very simple. Next time I come to Tokyo, first thing I will be doing is checking if this place is free :) Thank you and hope to stay in Asagaya again!