My husband and I stayed at Gritt's place for a somewhat unorthodox reason: we're considering a move to Berlin and wanted to get an idea of what it would be like if we wanted to get a house and would therefore likely need to find a place to live at the edge of the city in an area like this, to get an idea of the commute and what life would be like in general. This is a lovely, clean and well-maintained rental unit, and even though Gritt and her family live next door it felt very private, so it suited our purposes just fine. I could also see it working well as a "rural-feeling retreat" for someone who, for example, needs a place to work remotely during COVID and maybe get out of their cramped city apartment for a while. It does not feel like you are in the city here, which could be a good or a bad thing depending on what you are looking for; if you are coming to Berlin for sightseeing then it may not be a great spot because the commute is pretty far (closer to 20 minutes to walk to the train station and then another ~25 minutes to take the train into town). This place is probably most ideal for a large family (there are beds for at least 6 people) with a car and/or bicycles. The neighborhood isn't the most walkable (most streets don't have sidewalks, although there isn't much traffic so you can just walk on the street) but we did see lots of cyclists; I think if we had bikes then we might have been able to explore the area more, and visit some of the nearby parks, which were just too far to walk to.
One heads-up is that the unit is a little sparse on amenities; we had to go out and buy shower gel, shampoo, laundry detergent, and spices for cooking, so if you have the ability to bring these from home, it might be a good idea. Thankfully there is a Lidl about 15 minutes away where these things can be purchased cheaply. We had no problem using Uber to get dropped off at the Airbnb, but we could not use it to (pre)book our ride back to the train station at the end of our stay; however, we were able to do so using FREE NOW (the European taxi app). We cooked our own meals but I checked and it looked there was a decent selection of food delivery using Lieferando. There are also three kebab shops and a couple of small restaurants near the Karow train station, and a Domino's Pizza that delivers. So, you do have limited options if you don't want to cook yourself every night.