Guillermo's flat has the potential to be an amazing place. Check-in was easy, there was somebody waiting for us to give us the keys. We had an issue with hot rooms. They were very prompt about bringing us fans which was appreciated however the fans only blew hot air around. The description of the house said it had AC but if you read the fine print the AC unit is only in the living room and it does not work very well. Not having air conditioning in the summer in Barcelona is a dealbreaker. We suffered tremendously. While reading reviews, it appears that Guillermo has taken note of this issue and my sincere hope is that he upgrades to have AC throughout the entire flat.