We had a great time at Kazuko's place. Perfect room to stay for two people, for Japanese standards room enough! Everything you need is there, kitchen is not really for cooking, but with that many restaurants in the neighbourhood you don't neef it, you can use refrogerator to store some stuff and make tea.
Good beds and the Wifi egg is very convenient! Location is great in Shibuya, and you can easily walk to Harajuku/Omotesando. Definitely recommend it!