We had a great time at Pepa's appartment. It's nicely located in a lively area (little bit hipster area), there are good bars/restaurants around. It's a super silent apartment, mainly because it's on the back of a courtyard.
The house is compact, but has everything you need. There is only a few windows with no view. We spend all day outside, so for us not a problem. Keep in mind that it is on the 4th floor, so there are some stairs involved.
We didn't meet the host, but we received all the information we needed for the apartment. Also, provided some usefull guides from Madrid. Pepa is very helpfull and eventhough we didn't meet, she checked in with us how we were doing.