Daniel's place was in a perfect location. The S train was only an easy 10 minute stroll, 5 minute if you're in a hurry. Daniel left us coffee and a bag of pastries as a welcoming. It was very nice.
Daniel was able to accommodate my family and friends with a baby play pen and extra bed sheets/towels. There is a bakery around the corner to get pastries or coffee. There are also some restaurants in the area. We had domino's pizza deliver to us one night. Victory Column is about a 15 min walk. The Brandenburg Gate is about 30 mins away by foot, but it's also an easy train ride there.
Although the apartment is on the 4th floor, there is an elevator. It's a small one, but it does its job. It broke during our last 2 days, but we enjoyed the exercise. =)
We drove there and found parking easily within the neighborhood. It's free, too!