This is a pretty ideal location for a solo traveler. The Yoyogi-Koen train station is just steps away. I appreciated the clear instructions for gaining access to the room; however, I did have some issues initially finding the apartment. When I clicked on the address provided through the Airbnb listing, my Google maps took me to another short-term rental apartment a few blocks away. Because I can't comprehend Japanese addresses, I didn't realize this, so I brought my luggage up the several flights of stairs and struggled with the lockbox for a long time. I then tried clicking on another map link on the listing (rather than the address) and compared that one to where I actually was.
It wasn't until then that I realized that I was at the wrong address, so I had to carry my luggage back down and walk five minutes to the correct address. Once I reached it I could see that the pictures matched where I was standing. I don't think this would happen to everyone, but I can foresee the possibility so I suggest double-checking the location on a map if you are getting yourself there and not taking a taxi. I sent the host several messages when I was trying to find the location and never got any response, which I found disappointing.
In addition, the apartment is literally directly above a bar that hosts live music, so for light sleepers I would not recommend staying here. I didn't necessarily mind, but I was surprised by the proximity and just how loud it was. However, it is pretty reasonably priced, well-stocked with blankets and a heater/AC unit, and was spotless. I really liked the design and its super convenient proximity to the trains, so despite the rough start I would recommend this to others looking for a simple, well-appointed room to sleep at night after your Tokyo adventures.