Guillermo's place is a very modern flat, and is very nicely decorated. The location is central, but just note that it is on the edge of Condesa and actually more in Roma (which the host describes, but we missed). It's not too much of an issue though as it is still very central, and there are a few bars and restaurants very close. It's only a short walk to Condesa (about 10 minutes), and metro station, Sevilla is a short walk away if you want to go further afield. Guillermo was a very helpful host, and he responded immediately with any problems we had, and sorted them out straight away.