We stayed for 7 days in September 2022, attending a conference and 3 free days. The interior of the apartment puts a smile on your face. So did the squirrels in the back garden collecting their winter stock. Two blocks away is a bio supermarket in a very lively neighbourhood (closed on Sunday). Safety is great, when you take the key, the apartment shuts all windows.
Some more help re public transport would have saved us time, but it was not difficult: bus line 100 goes to Reichstag and Museum Island; bus line M29 to Kreuzberg. If you go soon, avoid station Alexanderplatz, it is a nightmare. We have absolutely no hesitation recommending this apartment.