My wife and I stayed at this apartment for 9 nights. All interaction with the host was done through email/airbnb, we were simply given a keycode for the electronic lock to enter the apartment, and never met with anyone. Their English was fairly good, and we were able to get responses to questions fairly easily, though the responses could sometimes take up to a day. They also had someone come in to clean the apartment and replace the towels/linens about halfway through the stay, which was a nice surprise.

The apartment itself is not a bad size for a studio, and overall fairly well-equipped in terms of things like an electric kettle, hot plate, microwave, fridge (with small freezer), etc. The washing machine was not working during our stay, but there is a coin laundry literally across the street that has very good washing machines and dryers (good dryers can be somewhat rare in Japan). The bed was quite comfortable (though extremely squeaky), and the wifi connection was good quality (always important to us). We had a bit of trouble trying to figure out some things like the shower and washing machine (before we realized it wasn't working) because the instructions for them seemed to have been removed from the book in the apartment and not replaced before our stay.

In terms of location, there are basically two aspects to this - location within Tokyo overall, and within Takenotsuka. For overall Tokyo, the location is not particularly convenient. It takes over half an hour to get to most of the major areas of Tokyo like Shinjuku, Shibuya, Akihabara, etc. It also involves taking a Tobu train line, which will not work with things like the Tokyo Metro or JR passes. However, the location inside Takenotsuka is quite good. It's a very short walk from the station, and there are many restaurants, a large grocery store (Peacock Store at the station), a 7-11 and Lawson within about a block, and so on. It's definitely not a tourist area at all though, so if you don't speak any Japanese you may have a little bit of trouble since there isn't really any English anywhere (and people working in restaurants/stores around here probably don't speak it at all either).

One final piece of advice: the apartment is on the 4th floor of the building and the stairway up to it (there is no elevator) is very cramped. Getting large/heavy luggage up and down was definitely not an easy task. So just be aware of that potential difficulty if you have large suitcases.