We had a fantastic stay at Casa Cosi and would strongly recommend it to anyone who is looking for a larger apartment in Eixample close to a lot of wonderful restaurants. The hosts are a company vs an individual, so they are super efficient and reliable; the communication style and smoothness is of course a bit different (less personal) than an individual host - but we had no issues with that. They were very responsive and helpful with everything we needed and the whole process went seamlessly.
One thing to note (and this isn’t Casa Cosi’s fault - more FYI so you know what the building is like) there were some neighbours who were quite loud on weekends when they would head out to party around 11pm, and then also when they would return around 3am and 5am. Not ongoing/prolonged noise but enough to wake us and our young children up. This might have been partly to do with it being Carneval weekend when we were there. On weeknights we had no disturbances.
Thank you Casa Cosi!!