This isn't the Ritz, it's not a Hilton, It's not even a Holiday Inn, so if that's what you're expecting, look elsewhere. I booked this hotel because the photos on the website conveyed an old school charm which caught my imagination.
The photos are very reflective of what you will find in this hotel, mediterranean style tiled floors, large beds, and an old-timey aesthetic throughout. The rooms are comfortable, clean and well furnished. Breakfast is continental edging towards an eastern european style of meal, but there is a great deal of choice, and everything tasted great. The hotel staff are friendly and helpful, and you get the impression that they really care about the hotel, the guests and their experience.
Location wise you're a little further away from the centre of everything, if you're a walker like me you can be in the middle of Berlin in just over an hour, or you can hop on the U-Bahn at Fehrbellinerplatz Station which is a two minute walk from the door of the hotel. The U-Bahn will have you in most parts of Berlin in 20 minutes or less.
In short, great hotel, great room, great experience!