We were a family of 5 staying (2 adult and 3 children) for 6 days in August.
The weather was very warm during these days (around 30-35 degree).
The first two days we did not dare to use the pool, since it was very green due to algae, and we could not see the bottom of the pool. The host told us the pool was safe, but it just did not look that way and we did not want to gamble our health. But the host added more chemicals to the water and after two days, it looks much better. And with 3 kids in that hot weather, we could not wait any longer, so we started to use the pool, and it was OK even though the water was not clear jet. 😊 The water got clearer day by day.
The house was beautiful, both inside and outside. The house was clean and fully equipped. The garden was like a green oasis.
But the location was a bit too far off for us. And since we did not have a rental car, it took too long to travel into center of Berlin by S-Bahn (10 min walk to the station and then 30 min into Berlin). And going 10 min to the closest food store, is also a bit difficult with a lot of food to carry back. But we asked the host if we could borrow the bikes in the garage, and we could, so this helped a lot re shopping.
Overall our stay was very pleasant, and the kids played a lot in the pool.
But if you plan to travel into Berlin each day, then I would recommend finding a place closer, or else you will feel you spend too much time on traveling to and from.