We stayed for five nights here and were really impressed. It's exactly how it's shown on here; very modern and spotlessly clean. Two of us stayed here, it was very spacious and had everything we needed. The bathroom and kitchen are both modern and had everything we could have needed for our stay. The bed is on a mezzanine so wouldn't be ideal for anyone with mobility issues due to the narrow stairs and low ceiling. We stayed on the very large pull out sofa as it was so comfortable.
The apartment is a few minutes walk from the U-bahn which took us directly to many of the main areas of Berlin. We found it easy to find our way around the local area as most restaurants, shops, etc were all along one main street along with a very well priced supermarket.
We didn't need to contact our host for anything after we arrived as everything was provided and we had no issues but all contact previous to our stay was replied to very quickly and always helpful.
We would definitely recommend this apartment to anyone looking for somewhere to stay in Berlin!