Our stay was comfortable at Daigo san's place. The building is just 5-minute walk from Exit B1 of Oshiage station. The directions and pictures in the booklet were very easy to follow. There are convenient store and a small cozy sandwich/coffee shop nearby. The building is new and has good security as you need to have the passcode to open the entrance.
The room was large enough for 5 of us with small suitcases (it may fit one more person). All amenities were available so we didn't have to bring or buy anything else except for our own water and food.
Daigo san was also very accommodating when I requested for early check-in and was quick to response when I had trouble checking in on the tablet.
Overall, I would recommend this place to anyone who wants to have a comfortable place to stay in a quiet neighborhood with easy access to/from the airport and main attractions in Tokyo.