The apartment is located within a very short walking distance of 2 U-Bahn station which made getting around Berlin so easy. The area is pleasant, mostly residential but - as in all of Berlin - there is building work in the vicinity, although it did not disturb us over a weekend.
The apartment was very clean, just as described and worked for 2 couples as we each had our own WC and shower. The beds were comfortable and the kitchen equipped with all we needed.
There are cafes and restaurants on Inselstrasse, although some were not open at the weekends. We ate at the Italian restaurant - Dolcette - which was excellent, but busy so book ahead for a Saturday! The Bakery by the Museum U-bahn was also very good!