I was there last week checking in on wednesday out on saturday.Indeed the hotel became more crowded from friday on, but it was still not nearly as crowded as in late may, when I was there during a big convention.
As posted above, cost of internet access is a little bit too expenisve, especially in the business center, but there is a Kinko heading north on 535 after 150 yards on the right side.
Staff in the RC was simply nice, I was there for the fourth time within a year now and they are starting to remember me, especially this time, because KLM had lost my bags for over a week and it became a running gag, every time I entered the club room.
So if anybody goes there soon, tell Nancy the german guy without the luggage for over a week, got it back , but KLM lost it again on my way back to DUS...