Me, my wife and our 3 year old son had a wonderful one month stay at Casa Cosi. We arrived few hours early and were allowed to check in early. The space was well organized with great amenities and lots and lots of towels which was very helpful for our long stay. The terrace was awesome and big enough to have our friends over. Owen was very helpful and responsive to our needs and questions. For long stays, you will be charged for electricity and water as it is mentioned on the description. Also you will need to pay a tourist tax in Barcelona. You can check the amount with the host before booking. Overall we had a great and comfortable stay and would highly recommend Casa Cosi.