I stayed in Ryusei's place for 8 nights. I loved the location and neighbourhood so much! There are nice local restaurants, supermarket, cafes and the 24-hours Asakusa Don Quijote (15 mins walk). I went out to walk to Sumida Park (15-20 mins walk) a few times and loved the Skytree and river view there. Most of all, nearby Hibiya line has some key stations like Ginza, Roppongi, Ueno and Akihabara and Tsukiji, and Uguisudani station (JR Yamanote) is also close enough if you need to use that line.
Ryusei and his house was equally awesome! His house was clean and roomy for a Japanese house, and I loved the fact that the bathroom and toilet are separate. The kitchen is fully functional and microwave oven is very new although we only used the kitchen once/twice as we always ate out. The stairway to upstair is quite stiff but it should be ok once you get used to. We loved the house so much and would absolutely look for Ryusei's house first when we plan our trip to Tokyo again. Thanks Ryusei!