I recently stayed at the Ibis Altstadt for two nights. The hotel is located in the Old Town, across the street from the tourist center and just 2 minutes walk from the railway station. I found the reception staff, during my several interactions with them during my stay, to be polite and cordial but not necessarily welcoming or helpful.
I was assigned a single room. As others have mentioned, the room is very basic and small, but adequate in size to be comfortable. It was, however, clean and bright and the bed comfortable with clean linens. My room overlooked the courtyard of the adjacent museum. The bathroom was rather small with very little "legroom" next to the toilet (see photo). Hand and bath soap is dispensed from a wall mounted container.
My room rate did not include the buffet breakfast so I paid the 10 Euro cost. Although not extensive, the buffet was adequate offering breads, pastries, cereals, cold cuts, and I believe scrambled eggs, in addition to coffee, tea, and juices. Overall, not bad for the cost.
If you are looking for a basic, clean place to stay, at an affordable price, while visiting Nuernberg, this Ibis is a good choice.
For directions by train from the Nuernberg Airport, please see the posting by contributor "Elgar" on 10/24/12. From the hauptbahnhof (railway station), take the escalator down to the basement level as you exit the walkway from the platforms. Follow the signs to the "aldstadt" (old town). At the bottom of the escalator, stay to the right, then veer to the left when you see the bakery on the left. Walk straight, up the cobblestone pathway. At the top of the ramp, the hotel will be on your left next to the Hotel Victoria.