We enjoyed our stay at Vivian's place in Akasaka. The location was extremely convenient for the purpose of our stay and the amenities were sufficient to meet most of our needs.
This isn't intended to be negative, but I do want to comment on the apartment itself and the practicality of the set-up. While aesthetically nice, the space had many aspects that left me scratching my head a bit, wondering if the design was just to look nice rather than being a livable space. The smaller bathroom is very small and essentially unusable for anyone 170cm or taller. The kitchen sink also serves as the bathroom sink. I would have liked to see a bathroom sink and vanity in the place of the smaller bathroom. Trash disposal is also done by a private company, and the separation rules are different from those of typical residences in Minato-ku.
We've lived in Tokyo for 8+ years and know Minato-ku well. While the space was pleasant, it doesn't really represent a typical mansion or apartment in Tokyo.