The apartment is just as pictured - very clean and well-designed, and in a fabulous location. It is right in the midst of a fun, local drinking area (lots of izakayas) and within walking distance to Ginza and to 3 stations (Yurakucho, Hibiya and Ginza). We absolutely loved the location and found it a very convenient hub for our adventures around town.
The highlight of the apartment is the gorgeous hinoki wood bathroom. It was great being able to relax daily with a nice hot bath. We also appreciated the nice toiletries (shampoo, body wash, soap from Marks and Web). My husband loved them so much I bought some in Omotesando Hills. Other helpful touches - washer/dryer combo in the bathroom, functional kitchen (note - there are some utensils and plates, but if you do want to cook you will need to get oil, salt, etc.). There is a hot water kettle and coffee carafe (for drip coffee).
Mas-san is a helpful, attentive host. We didn't have any issues during our stay but he would check in with us periodically.
Some nearby recommendations - the closest convenience store is a small Family Mart which was fine for water and snacks. There is a larger convenience store (7-eleven) in the Tokyo Midtown Hibiya center a short walk away (near the Godzilla statue). You can pick up Tim Ho Wan bbq buns at the takeout window nearby. Lots of Izakayas nearby (most tourists try Yakitori Ton Ton underneath the tracks which is fun) but we prefer Andy's Shin Hinimoto and some of the no-english name locations nearby (just do a google map search and look at the high ratings). Some casual restaurants - Ikinari Steak, Sushizanmai, Chao Chao Gyoza, Ginza Kagari Honten (amazing chicken ramen), Ichiran (closest one is one station stop away at Shimbashi), Tomita (sister location in Kitte Mall). Some favorite bars in Ginza - Bar High Five and Apollo Bar.
The noise from the trains and street didn't bother us, but if you are a light sleeper, you may need noise cancelling headsets or ear plugs (which are provided). Sometimes we heard noises from the stairs, but it was tolerable. Note, there is no elevators and there is a narrow flight of stairs leading up to the apartment. We considered it a good daily workout, but if you have trouble climbing stairs, this may be an issue for you.
We would definitely recommend Wow Ginza! When we come back to Tokyo (this was our 5th trip), we would rent this again.