The apartment is well maintained, the kitchen includes everything you'll need, wifi is good, the owners left us enough towels and linens. It is located within a walking distance to a metro station and a longish walk to the beach and the Rambla. Josep was responsive by texts/messages. In these regards, everything is fine with this property. Now for the buts and there are many.
1. Josep didn't meet us in person. Instead he sent another person to check us in. She was extremely unpleasant. We arrived maybe 10 minutes after 8PM (because of a city wide taxi drivers strike in Barcelona). She insisted she should charge us late arrival fee for that. Luckily Josep calmed her down (by text, we didn't see him). She charged us the city tax, didn't give us a receipt or a change for the money we paid. She gave us a long speech about all the bad things that could happen if we violate the house rules.
2. The apartment is on the first floor of a building located on a 4 lanes street. Just across from it there is a big (and busy) playground. There is nothing pretty about this street and it is very noisy. True, the windows are great and block most of the noise. So you can choose to either enjoy the noisy and polluted street or shut the windows and enjoy a stuffy (hot) apartment.
3. There is no AC in the apartment. If you are coming in a cold month of the year, that's probably OK. Otherwise, it's going to be very hot inside. The owner provides 4 fans. Good luck with that. Did I mention the apartment is stuffy and you can't really open the windows?
4. There is one small shower for the whole apartment. It might be enough.
5. The beds are very uncomfortable. The mattresses are made of the cheapest foam possible. The rooms are small, hot and stuffy. The living room is spacious.
6. There are several signs in the apartment threatening you to keep it quiet or you'll be evicted (the signs are not signed by Josep but by someone else). I can imagine the owner had had noisy guests in the past and these signs suggest the police was called. I sympathize with his wish to be a good neighbor but on the other hand I don't want him to project his past bad experiences on me and my family. His representative treated us as if we were some kind of spring-breakers looking to trash the apartment and party all night.
To sum it up, I wouldn't bother with this apartment. Barcelona is big and you can find something much better for the price Josep is asking.