Excellent location. 3 minutes walk from Ikenoue station, which is only a 4-5 stops from Shibuya and one stop before Shimokitazawa, which is a very lively commercial area with numerous restaurants and shops. Also walkable to Shimokitazawa (about 10 minutes), so the apartment is in a quiet residential neighborhood, but definitely walkable to Shimokita's fun area.
Unit seems quite new. Very clean and well equipped. Very spacious for one person. Probably okay for a couple, but may be a little tight for more than that.
It's clear this units is owned and operated by an individual who used to live here herself. (Unlike other rental units that are designed and operated as a rental unit by a commercial entity.) You can feel the personal attention to details in various aspects like the quality of the towels and even the toilet paper (was one of the best quality toilet paper I experienced in Japan!)