Nachos place is in the neighbourhood of Ruzafa. My favourite part of town. Surrounded by hundreds of restaurants and shops and the local market (mercat ruzafa). If your looking for a quiet stay, this is not the neighbourhood. It is lively, and weekends even more so. There is some construction around and can be a bit noisy. However, it is a great place if you want to be central in the city. Everything is close-by. The wifi works great anywhere in the flat. Nacho was very welcoming. He even picked us up at the train station. Very nice!!
As others have mentioned, the stairs are quite steep. But only on the second floor. Good place for ruzafa!!