Looks like there have not been any updatesfor decades. Rooms are a good size, plenty of storage with balcony and walking distance to town. Furniture is dated, carpets dirty and baths in need of updating. If you have a car, you’ll pay 10Euro/day and good luck finding a parking spot. We were there 10 days and the only time our bedding was changed was the day I stripped the duvet and pillow cases. My husband did not strip his and you guessed it, his 8 day old bedding was left on. Dirty coffee cups were not exchanged until we called down for fresh ones. We had to ask for additional packs of coffee almost daily. Internet is so slow, we were unable to message pictures. This hotel used to be a first choice but it has gone downhill. The bar staff is very friendly and accommodating. Drinks are good.
The Maritim in Köln is still beautiful and a 4 star hotel. The Maritim in Gelsenkirchen is a 2+.