Everything was as described on the page; pretty much a what you see is what you get kind of situation. There is a little bit of background noise due to the apartment being located in front of a motorway, but it felt more like white noise rather than a general disturbance.
Yuka and the ZENS team kept in constant contact with me leading up to, throughout, and after the trip; nothing went awry in this trip, but it was nice knowing that I could get in touch with the management at any time to try and work things out.
Definitely would recommend this apartment for anyone staying for an extended period of time that would like to get a small taste of what it feels like to actually live in Tokyo