A good hotel, among the advantages: location, friendly/helpful staff, good breakfasts, generally good rooms, there is paid parking (very important for Frankfurt). Cons: ventilation does not work well, there is no air conditioning, it is noisy in the evenings / at night (windows are open outside under the windows of the cafe), I would like a better room cleaning. And so I recommend it in terms of price / quality ratio.
Although the hotel is located in the city center, the quality of the rooms corresponds to the hostel. The bed is not very clean with holes. The elevator is not working. Parking inside is 14 euros per night. Breakfast is minimal, just a snack. The staff is a friendly older man. The sights of Frankfurt am Main are within walking distance from the hotel.