It's a perfectly serviceable hotel in what I consider to be a very convenient location. The staff are pleasant and effective, the breakfast is quite tasty, and the rooms are decently sized, modern, and very clean. The fact that the hotel doesn't have air conditioning is a bit of problem, and I imagine it's going to become even more of a problem as time goes on since the old "well, they have huge windows and it never REALLY gets the hot in northern Europe anyway" line simply doesn't hold true anymore in any predictable way. I mean seriously: woe unto you if you end up staying here for several nights during a genuine summer heatwave. But during the fall, winter, and spring I think it would be an unquestionably good choice for pretty much anyone looking for a nice place stay in Berlin.