We loved our stay at Andrea's. The neighborhood is such a great spot to wander around. We loved seeing all age ranges out and about in plazas and the seemingly endless options for great food. Andrea is so genuine and set us up for a enjoyable stay (he even ran over to help me when I locked the key in the apartment!). You're very close to the metro which will take you anywhere you need to go. To get from the airport you'll need to take a bus (for about 30 mins) and then the metro, and then walk to the apartment. All in all we loved spending time/ having downtime on the patio and exploring this area in Barcelona!
One note depending on how you sleep-- there is not air conditioning so during the hot months you will need to sleep with the windows open, and because of this it is very loud. Between people chatting to late night folks to trash collection-- it's a lively collection of sounds which we enjoyed but it might not be for everyone. Just something to note depending on how you are as a sleeper!
We hope we can come back soon, we loved it.