This location is awesome. You are two blocks away from Brandenburg gate and there are tons of restaurants and things to see/do nearby. As an aside there is a great grocery store just two blocks south as well!
The apartment is clean, spacious and very bright. We loved the evenings and mornings there. There is an elevator which was great as many other locations we were at on this long trip required carrying bags up and down stairs. The wifi is very good too.
If you want to the be in centre of Berlin within walking distance of almost everything I would totally recommend this spot!!!