Been twice, once a while ago, and once fairly recently-ish.
The first time we went, the airport was literally a shed with two doors. In fact, i’m certain a few posters here have bigger sheds.
The second time, the airport was an actual building that resembles an airport, still tiny, though.
The city itself has transformed so much between the two visits. It was lovely both times, but it was much more “modernised” the second time (and can only imagine even more modern now)
The waterfront and old town are beautiful. There are some fantastic restaurants around. Westerplatte is fantastic and well worth a visit, if a bit harrowing and likely to bring a tear to the eye:
https://en.wikipedia.org/wiki/Westerplatte
When I went, you could walk all up to an on the ruins. I don’t know if they’ve taken steps to preserve them or H&S efforts at all.
There is a great torture museum on the waterfront, near the old crane. Well worth going into if you’re not squeemish!
Restaurants are great, I remember the portion sizes being huge! Beer is also good, and very lethal.
I’d go again, but the city from what I remember is quite small. Keep a look out for bullet holes all over the older buildings.
if you go in the winter the river freezes. if you go in the summer it can reach 30+ degrees easily.