This is by no means a 5-star hotel, but it doesn't aspire to be. It is, however, and excellent stay. I can't speak for their other locations, but here B&B excels at what they're trying to do.
Everything is clean, welcoming, and feels modern. The staff is more than friendly and helpful, beds are comfortable, water is hot, and the room is quiet.
The hotel is supposed to be affordable, and it is at less than €50 per night. Where this hotel stands out is the quality of stay you get for that price. The rooms are a bit small, there's no extras in the room (you get linen, a TV, the eco-friendly liquid soap/shampoo that a lot of hotels are beginning to use, and an electric kettle but no tea or coffee), and beyond the restaurant downstairs, there are no other amenities on site either. But it looks and feels much nicer than any similarly priced hotel I've been to in Germany. I tend to look for bargains on lodging when we travel (because the goal is not to spend all our time in the hotel), and this is beyond a bargain. 5/5 for B&B, I will definitely stay here again the next time I am in Nürnberg.