This hotel is only 7 to 10 mins away from the main train station. Once you crossed the underground passageway, you will see it right in front of you. Also, it's just another 10 to 15 mins walk to the old town.
The front desk is so helpful even we have some little special request, we can feel that they tried to fulfill us in anyway they can.
I would consider to state with this hotel again if I have to visit Gdansk again.