I've been to this hotel three times, and I'm sure I'll come back more than once.
The hotel is located far from the center of Sopot, but there is a train stop nearby, which can take you very quickly to Sopot, even to Gdansk. You can walk along the embankment to the mall, the walk will take about an hour. But it's a minute to the water park! The place is quiet, the air is fresh. There is a supermarket and a couple of cafes nearby.
The hotel itself is clean, everything is fresh, the staff is pleasant. The breakfasts are delicious, do not spare money. You won't have such a good breakfast in the nearest cafes. I found only one disadvantage - single beds are narrow for me. But this is a small thing.