Great location on walking distance of 2 fairly good and fair priced restaurants (Il Castello, which we tried ourselves). Restaurant Zum Speicher also has a good review, from the subway (station Berlin-Buch is on walking distance. From berlin-Buch to Alexanderplatz is by S2-U2 only a 40 minutes ride, change at Pankow).
Villa-Hufeland has all necessary amenities, but no breakfast (frühstück). Coffee and tea in the morning is lacking, this would help for the first morning. A large Kaufland supermarket is very near. There is free parking upfront and free wifi is available.
If they would organize the garden, it would be a great asset to look at.
I can recommend Villa-Hufeland.