Great location, minutes from the beach and good restaurants. Flat is spacious and airy, with plenty of room for family of four. Water pressure was very low during our stay making showering a challenge, but I suspect this is a feature of the area, rather than the flat. The rooftop terrace was brilliant, with surprisingly dark skies.
Colonia Sant Jordi itself is pretty soulless, but convenient for a few days in or near the water, and the coastline is very beautiful.