My girlfriend and I stayed here only for 2 nights, but it was great. We had to check-in early and checkout early as well because of our flights, but Robert was very flexible and there were no problems with this. The whole place was very clean, the terrace has a nice view on Berlin and the sauna is a great place to relax after a long day of exploring the city. Jack is a very good dog, always looking for scratches and love. Definitely recommend the stay here, 100%.