The main problem is that they have no reception. If you get there and you have and American credit card, you will have problems because the machine where you have to check is asks for a credit card code, we has to wait a long time on the street for this problem to be solved. After getting into our room, the machine gave the same room number to other people so they just entered into or room when we were there!
We stayed 4 days, but the room was made just one time because we asked for.
We had to stay one more day in berlin as there was a train strike, so we paid for one more day, however the deactivated our internet code and even thou I called the lady she didn't do anything about it and I wasn't able to change my reservation on the other hotel and ended up paying more for this lazy lady's fault. On top of that, the next day when we went to have our last breakfast there she gave me such a big attitude.
Skip this place, clients attention is horrible and the hotel is far away from every thing.