I'll try and break down the apartment the best I can for you, giving you the realities of the space and location and how they related to my personal preferences. I stayed in Apt213 for one month.

5 stars for Tatsuro-san. He's the kind of guy you know would go above and beyond to take care of you, and like others have said he felt like an uncle.

The neighborhood is pleasant - It's got everything you could possibly want, especially for an extended stay, and it's all within a short walking distance. The only issue is that it is far out from areas like Shibuya, and you should expect to spend 40min-1hour on the train, and spending around 800 yen to get out and back.

The apartment is very small, almost dorm room sized. The shower is shared with the toilet, so if you dislike having wet feet when going to the bathroom make sure you use the squeegee to get rid of excess water after your shower. The kitchen is fine, and I was able to cook meals during my stay. Tatsuro provided me with a rice cooker. The bed was comfortable and warm.

The road noise through the window was very prominent, and it took me almost my whole stay to get accustomed to it. If you are a light sleeper, you most likely will be disturbed by the street traffic outside, and if you are working remotely and require quiet, it may distract you. Also if you require pitch darkness, the blinds do let quite a bit of light in and so I'd recommend you bring an eye mask.

Overall the place is good value, so if the negatives I mentioned don't bother you then Apt213 is worth staying in. I'm going to miss Fujimidai!