I recently stayed 2 nights and I was pleased with this apartment. Although it is not next to old town of Gdańsk, it is actually not bad with 15 minutes walk. It takes 10 min walking to the train station.
The apartment is spacious and newly remodeled. The double bed is comfortable. It is in a new high rise community. It is quiet and safe. The kitchen has fridge, oven, cooktop and supplier. Although I have not used it since I was solo traveler, this will be helpful for families.
No offense, the reason I gave 4 star for service is because not very easy to contact the owner as apartment. I arrived before 11 AM and I need my suitcase to be stored. I guess that is common issue for apartment. Other than that, I would highly recommend this.