This is my second time staying at this property. The location/price are very good, however, the single room size is very small. If you're a solo traveler expecting a nice relaxing stay in your room, you might feel a little claustrophobic. I was usually out of the room and just wanted a place to sleep, so I was alright with the room size.
Having said that, the staff is great and very accommodating. There is even a book with useful information regarding stuff such as transportation, laundry services, travel zones, and so on.
The location is also very good. It's a few stops away from Alexanderplatz, but even then, there is so much to do in the area surrounding it!
I generally recommend this property. :)