Davide was a very nice and relaxed host. He responded my messages very quickly, gave precise directions and made my stay very comfortable. The apartment is central, you can walk to many places by foot. Although you might feel a bit insecure around Raval at night, but I did not have any bad experience whatsoever. The flat is very clean and organized (Davide was cleaning every day!), with a nice living room to chill out and talk. It can get noisy outside at night and in the morning, but I used earplugs and it worked well.
All in all, it is a very good value for Barcelona.