We had a very nice stay in Inga & Golo's apartment. Our kids (ages 2, 5 and 7) loved playing with the toys available for them. The apartment feels very spacious and relaxed. The location of the apartment is close to UBahn and SBahn, and there are markets close by.
The communication with Inga was excellent. We didn't get to meet her in person but her friendly neighbours met us in person and gave us the keys. They live upstairs and are easy to contact if you need anything. I can really recommend this apartment, especially if you are a family with kids.