This is a great location and a nice home base for exploring Berlin. For quick groceries there is Rewe close by and also pretty close a huge grocery Kaufland. As others have said, the patio is great for coffee in the morning or beer at night and looking at the city. We liked being close to sights and train station and enjoyed the outdoor market on Thurs/Sat.
The TV didn't seem to work but the wi-fi was very good. While there were some toiletries they all seemed random leftovers from other guests so recommend you bring soap/shampoo to be safe. There is also a nice travel size toiletries section at Kaufland.
Great spot and we would definitely come back.