Kazuko's place was as described and I had a great experience being there. It's right next to Tower Records in Shibuya (that's a really good building to remember in case you get lost). It's in a loud, lively area in Shibuya. You will expect noise through out the day, along with music from the distance. But honestly, that's what you'd expect if you are booking a place in Shibuya. I didn't mind at all. Felt like I was part of the city.
It's convenient to get to the subway, it's close to a lot of good food spots, and shops are all nearby. Need something quick? 711 is downstairs.
Room & Accommodations:
It is small, but again, you have to expect this if you're in Shibuya. Two single beds and a small tatami area. You can even go to a small patio to look outside. You'll feel packed with your luggage, but once you settle down, all will be fine. Yay for a good working AC. The shower room is small. Just be sure to stay tidy.
Kazuko gives you free snacks, drinks, and a hot spot WiFi. All awesome. She also provides a hair dryer, mini steamer, an extension cord, and soap.
Overall:
I recommend this place if you want to be right in the middle of action of Shibuya. It's cozy enough for sleeping and relaxing, while close to everything. I would rebook this place again if I return in the future.