We had a three night stay at Hanza hotel, and experience was awesome. Location is just perfect, if you are planning to visit Gdansk old town. There are lot's of restaurants and attractions near by, so everything is in walking distance.
We had a room with canal view, which was really nice, because canal is really calming and there are just some cruises going back and forward but nothing which would be making disturbance.
Room was clean, roomy and everything was working as should in the room. Hotel breakfast is also really good with everything you need to start your day and restaurant has it's own terrace as well.