The TA-HOUSE is an excellent place for solo travellers on a budget and who want privacy. However, it's still a budget place so don't expect a huge apartment or five star amenities. The toilet and bathroom for example, are really cramped and in the same tight space.
There is Wi-Fi, but it's rather mediocre and at least in my experience, a fraction of what was advertised (20 Mbps compared to the supposed ~200 Mbps). The WiFi signal was also rather weak, so I suggest you bring your own pocket Wifi.
Location is convenient going to the Ikebukuro line, but still rather far from the main city and expect more than an hour of total commute times to the popular tourist attractions (without delays). It's advisable you spend your whole day in the main city to make the commute worth it.
This listing still deserves a full five stars though for the deal you're given. Private room/hostel prices for a super spotless private apartment, which is just kind of far from the city.