I was staying at the Best Western St. Raphael in Hamburg during my visit for Cebit 2008.
Frankly speaking the rooms looked much better and spacious on the website (through which we made the booking). Main issue was that the rooms were very small. I have never stayed in such a small room.
One other downside was the fact that one could hear and feel the subway when it passed. I assume this is an issue that all buildings face around the central train station so I can't really blame the hotel for this. I am just mentioning it.
On the other hand, the rooms were cleaned every day, the staff was very polite, breakfast was good and the hotel located in a convenient place and near the center of the city. The central station is walking distance (5-10 min).
Wireless internet is free.
Overall, for all that it provided, it could have been slightly cheaper.More