This is a spacious apartment on the ground floor of a beautiful old building. The apartment is newly refurbished, so it's a cosy mixtrure of old and new. There's a well-equipped kitchen with a coffee machine, a large bathroom and a quite bedroom facing the courtyard - a sound sleep at night is guaranteed. Everything is immaculately clean, and there are plenty of fresh towels, sheets and blankets to keep you warm and cosy.
An U-Bahn station is less than a 5 minute walk, and it's only two stations from Alexander Platz, so you can get anywhere pretty easily.
Communication was quick and clear. I had no problem finding the apartment, and check-in went smoothly.
The only thing missing is Wi-Fi, but hopefully it will be fixed soon.
I would gladly return when I visit Berlin next time.