I stayed three months at Luis place. He is a great host and is always there if you need him. The apartment is well located, 2 mins to the subway station Sant Antoni and 2 mins to several grocery stores. The Plaça catalunya and Parc Montjuïc are in walking distance (15 mins).
The apartment is good equipped and for 1 to 3 guests spacious enough .
I had a great time at Luis place and can highly recommend the apartment.