If your main priorities are budget and location, this is a good choice, especially for a solo traveler. However, if you care about cleanliness, it would be better to pay a bit more and find a hostel or someplace else. The location is great since it's a few mins walk from Komagome station which is on the JR Yamanote loop line. There's lots of cheap restaurants and convenience stores around the Airbnb and station. That being said, the room is tiny for 2 people and there's barely any space to put your suitcase/bags. The bed board seemed loose, the mattress was really old, and the blanket was too small to cover 2 people under 5'10.
We only got one towel each and they smelled really bad so we washed it after the first day and asked if there were any extras. The replacement towels we got actually smelled even worse so we ended up just buying our own nearby. The host also doesn't speak any Japanese or English, just fyi. If you're staying here, just bring your own towels and be okay with staying in a really small room since it is fairly cheap for the location.