I definitely recommend the place!
Sergi's apartment is a great deal, spacious and modern located in a top spot in Gracia. The neighborhood is very lively and central (we walked to all attractions), and is surrounded by many little squares full of local beer / tapas restaurants ;-) Lastly and very important, Sergi has been a great host - he gave us many nice tips and took the time to help us with touristic recommendations :-)