My husband and I have just come back from 6 days in Gdansk. We stayed at Willa Albatros, a charming family hotel in a quiet suburb, 10 minutes from the city. It was largely due to the good reviews here on Trip Advisor that we chose the hotel and we were not disappointed.
We had a lovely double room with bathroom and a large balcony. As everyone else has commented, the breakfasts were more than generous. What we didn't know was that the evening meal was included in the price. To come back to a home cooked meal after a hard day's sightseeing was truly wonderful. The food was very good and varied. The staff were friendly and helpful.
If you're planning a visit to Gdansk you should definitely stay here!

What a great hotel. We stayed there in January (yes, I know, don't ask!) - but still had a great time. HUGE breakfasts, with neverending coffee and orange juice. Drinks station outside the room. Clean and tidy, with very friendly staff. The only negative, and it's not really a negative, was location - out in suburbia...in Oliwa, which is sort of in between Gdansk and Sopot...so actually not a bad location, since taxis are cheap - and a short walk to the train station also. Very good value. Stay here!