Carlos was the perfect host and immediately took us under his wing when we arrived. He gave us detailed and spot-on tips on how to explore the city. Carlos' apartment was clean and our room was comfortable and quiet since it had it's windows (and private balcony!) facing the inner yard. The double bed was also very comfortable if a bit squeaky. The only tiny minus was that we had to share the bathroom with 3 other people, but since all of them were super nice and considerate this wasn't a big issue.
Poblenou is a good location with not much tourists but still easy and quick access all around Barcelona. There are multiple stores in walking distance. The district was quiet and safe even at night.