I had a lovely stay at Vegeta House - Mitsuko was so friendly and helpful and speaks fluent English.
The flat was very small but comfortable for one person of small stature. It was clean, cozy and had everything I needed for my stay. Mitsuko lends pocket wifi which is so so useful for using Google Maps to navigate when you're out and about.
It was really easy to travel around the city via trains - it takes only 3 mins from Hatagaya to Shinjuku Station where you can transfer to almost any line.
I really enjoyed my stay with nothing to complain about and I definitely recommend staying here!!!