The house can be summarized in one word. Location.
It is a really brisk walk from Takadanobaba station (which in itself is great for being well connected to Tokyo through the JR Yamanote line and the Tozai Metro line). The Takadanobaba area is also bustling with life, full of Izakayas, malls, convenience stores, and restaurants.
The access to the house is really easy using the keypad - no problems there. Having a keypad removes the worry of having to carry around a key.
The kitchen was well stocked (although we never cook during our holidays but it is a nice thing to have).
Naoki was also very helpful and responsive and replies to questions with relative speed.
Our only gripes with the house are as follows:
1-The shower - as previously stated by other reviewers- tends to spill water into the bathroom. By the end of our stay there was this weird smell of dampness because we couldn't control all that dripping coming out. The only way was to find a way to hold the back curtain so that you can curb the water from collecting in the back of the shower.
2- The washlet during our stay was not functioning. We made sure to inform Naoki and she was sorry to hear about the inconvenience and made sure to get it fixed after we leave. No major problem there, but life would have been easier with a washlet.
3- The amenities for the rest of the house were, well, average. They had clearly not been replenished prior to our stay. The shampoo, the tissue papers, the hand soap were all almost empty (it would have been a nice gesture to restock up between tenants - especially for a week long stay). In addition, we only had a shower towel per guest and no face towel (the description says shower and face towel per guest).
4- The garbage disposal policy was pretty confusing. The house manual includes a rather detailed explanation about what goes where and days of trash pickup, but for a couple on a 6 day trip that was too complicated for us to get. We ended up separating our trash into papers and burnables then ended up throwing them out at the nearby convenience store before we left.
All in all, a great stay that could become an excellent stay with some minor tweaks.
Recommended if you don't have trouble with the things we faced.
Thanks again Naoki for a great stay.
Alec and Reem