The location of the property is it's best selling point. Literally a 3 minute walk to the Yoyogi station where you can access virtually anywhere in Tokyo. The neighborhood is quiet, clean and easy to navigate. There is a grocery store 2 mins away and a number of solid food options with-in 10 mins walk.
If you are 2 travelers, this unit would be considered of OK size for Tokyo. I'd say this is on the small side for the price point you pay in Tokyo. Any more than 2 travelers would be VERY tight and would leave little to no room for your luggage, no room to move around, spread out and relax, etc. The bathroom is also very tight but on the plus side, the shower doubles as a drying room for laundry and this is a plus as it's not common in Tokyo.
It's also worth mentioning that beginning at 5am everyday, we would hear very loud footsteps from the unit above. This was unfortunate and distracting and should be a consideration for your stay.
Overall, the unit feels cramped and tight for my wife and I. Everything from the stairs (with no railing), to the kitchen area, to the height of the ceiling...feels a bit contained and would not be comfortable for more than 2 people. Even at that point, I would not stay in the unit again because of this. I hold no ill-will against the owner. I just believe there are better options at this price point.