Our family of five (two adults + three small children) had a wonderful time at Casa Cosi.
The apartment huge -- much larger than we expected. It's well-situated in la Nova Esquerra de l'Eixample in Barcelona and has both a fresh food market and a supermarket literally across the street from the front door. We were able to walk relatively easily to most areas of the city that we wanted to visit, and the more distant sights were a quick and affordable taxi ride away.
The views from both sides of the apartment are great and the amenities are fantastic. The 3 bedrooms are spacious (two are air-conditioned and the smaller one has a standing fan), the bathrooms are well-equipped, and the water pressure in the showers is awesome.
Owen and Silvia were both easily accessible, communicative, helpful, and fantastic hosts in general. Owen in particular was amazingly responsive and quickly assisted us with any questions or small issues that we had. We were very impressed with the service, as well as with the apartment itself.
We'll happily stay here again when we visit Barcelona in the future. Thank you for having us!