It turns out that they have a quite nice swimming pool and sauna area. At first I was not impressed with the sauna, but when the heat was on for more than 5-10 minutes, it was actually perfect.
The pool area has a 15 meter swimming pool with is comfortably warm (perhaps even too warm) and a small hot tub.
I was also very happy that they let me use the pool on my day of departure, after having exited the hotel hours ago. Nice touch, and allowed me to be fresh for my flights back home :-)