My friend and I stayed in Zarina's apartment for a week in autumn and we had a great time. The apartment was very clean, cozy, and quiet. The bus stop is super close and you only need about 20-30 minutes by bus to the city center. You can use the DOP App to buy tickets and check the bus schedule. There's a bus to the center every couple of minutes so getting around is no problem. There are three supermarkets close by and down the streets is a pretty lake if you want to sit down and enjoy a bit of nature.
Zarina was very friendly and when we had a question, she was quite helpful and replied quickly.
Copenhagen has lots of things to see, visit, and enjoy. A boat tour in Nyhavn is a must! You should also check out the Round Tower and its observatory which is open from October to March on Tuesdays and Wednesdays.
Staying in Zarina's apartment when visiting Copenhagen is highly recommended!