We spent a month at Nu's apartment and everything was perfect. It's located in a wonderful neighborhood and within 85% of the things we wanted to see and do in Barcelona. With metro lines very close by, we had no trouble getting anywhere in the city. However, just walking around the neighborhood was so fun too. With tons of great food and friendly people all around I will only mention a few. La Turca, downstairs, is a delicious kebab shop with great people and some of the best prices in the city. The clerks at Mi Alcampo were very friendly and the shop well stocked. I also have to mention La Baluard, the bakery around the corner that we went to often for croissants, sandwiches in the daytime, bread for dinner, and these amazing little doughnuts filled with Catalan cream.
With all the fantastic weather we had, the large balcony was a huge bonus. It was a real treat for all five of us to be able to hang out on the deck together and we couldn't help but notice that large balconies seem to be a rarity in Barcelona.
Finally, Nu was responsive and helpful to all of our questions and requests. Even a minor emergency the last morning of our stay was resolved quickly and politely, especially with the help of Rod, a friendly and helpful go between who went above and beyond to help us out and make us feel welcome.
We will definitely stay at Nu's again if it's available.