Disclaimer: Stay of 10 weeks, so my impressions differ a little from the usual short-stay reviews as I experienced it over a long period.
Now, both Jose and David are very friendly people, who are happy to provide assistance on the matter of living in Madrid - I really appreciate a lot of the tips and places they advised. There was always time to conversate when I had questions or simply felt like talking when they were around.
During the stay, I was a complete member of the flat - being able to use everything whenever I wanted to.
The one thing I have to critize is the cleanliness: while it was by no means a complete mess, it was for me, a person who is used to cleanliness, from time to time too dirty to fully feel comfortable; although during a short stay, one would most likely not face this issue as it is usually always cleaned up when new people arrive.