I stayed here a couple of weeks ago, again in a club room. I echo the feeling that this just doesn't feel as 'luxury" as a regular Sofitel. The club is too small. On a Friday morning I had to have breakfast in the main restaurant as there was a queue to get into the lounge.
On a more bizarre note, I had room service which didn't appear on the bill. Being an honest chap I pointed this out and the young lady on the desk argued that I hadn't had it as it wasn't on their system. In a 'life is too short' moment I just let it go.
I'm back in Berlin at the end of Sept but can't see me staying here again.