Stayed two nights for business, with meetings 5 minutes walk away. This hotel is basically ok: clean, decent sized rooms, polite staff. But the decor is dark and minimalist, which I found cold and unwelcoming. A few other things annoyed me. Cars are unable to pull up to the entrance, which meant i had to struggle with all my bags for around 50 yards (no help from staff either). The bed was on rollers and kept moving when I sat up against the wall. Room service menu didn't have much choice (although quality was decent). Breakfast was very average with limited choice - particularly for hot food.

Check in took absolutely ages.
Rooms cold but clean

New hotel, modern decoration, very good rooms and bathrooms.
Excellent breakfast.

Stayed at NH Constanza for 6 nights during a business trip. It was in a convinient location next to a shopping mall and lots of restuarants in the area. The hotel is modern and the rooms were clean and provide good space for working in. The breakfast was of a good quality.

I would definately stay again if visiting or working in this part of Barcelona.