This was a great find for us...stunning views from the 18th floor of a Mitte high-rise, with good security, fast elevators, a clean and fresh studio. Everything in the description is accurate, from the internet access to the proximity to trains and shopping. The little kitchen was very well equipped, and had a great coffee maker and stove top, and everything we needed to make the few meals we didn't take at restaurants. The bathroom had a great tub. The huge windows really were soundproofed! The heat worked very well (it was chilly at night). The bed was comfy. The iPod dock came in very handy.
The owner was very kind to us, waiting for our late arrival, and then gave us great recommendations for food, and was always available by email. We walked to Museuminsel, Berlin Cathedral, and the Nikolai Quarter, and took the U-Bahn everywhere else, since it was only a block from the apartment. There was a good supermarket a block away, as well as a good hairdresser.
It was such a good deal, and not only will we go back to Berlin one day, but we would definitely try to stay here again. Recommended for a couple, perhaps with a baby, easy access for disabled. Lovely, happy place that made our first time in Berlin a total success.