We stayed in this apartment for 9 nights in Tokyo and it was clean, secure, and comfortable. If you know Tokyo and plan to stay this side of town this place is great value.
The area feels like a business district, so lively during the week but quiet on weekends and holidays. The apartment is just slightly removed from the liveliest areas so you'll get a great night's sleep! There are plenty of food/entertainment options they cater more to the local after work crowd. It is very walkable from Ginza/Tokyo/Tsukiji and easily accessible by train to anywhere else. Hibiya park nearby is great for a jog and quiet time. The Mori Hills tower is down the road and has great coffee on the ground floor (Toranomon Koffee) and an incredible rooftop bar at the top (Andaz Boutique Hotel). Be aware that it is a fair distance from Shibuya/Shinjuku, particularly relevant late at night when the trains stop.
If you need to make any changes to extend your trip I recommend enquiring well in advance as rearranging the cleaning service seems to take a very long time.