Just go ahead and book Mieca's place — you won't regret it! She is responsive, thoughtful, and helpful. The place offers more than what is described in the provided information. I found Tokyo area guides, maps, information on train rides and umbrellas for rainy days, just to name a few non-listed amenities. You feel at home as soon as you check in. I stayed there for four weeks with my son and it was just perfect. It would be a bit tight for more than 2 or 3 people, but possible with little ones.
The location is as great as many other reviews say. Very close to Shimokitazawa station with two train lines (not JR) that go to either Shinjuku or Shibuya in less than 10 min. Also within a very short walking distance from grocery stores, convenience stores, pharmacies, Uni qlo, Dai so, ATMs and countless restaurants, bars and cafes.
It's on the 8th floor, so when we left the window open and the front door slightly ajar, we had nice breeze in mid June. Late summers in Tokyo are very hot and humid but AC worked just fine.
Mieca went above and beyond to be sure that we had a comfortable stay at her place. It'd be very hard to beat her place for the price offered at this perfect location in Tokyo. I recommend Mieca's place without hesitation.