Pros:
Next to Plaza Mayor and 2min. walk to Sol train station.
Friend/Greeter/neighbor was very helpful opening the doors.
Host was responsive.
Cons: There are 4 keys to different locks.
Difficult to open and not labeled.
Asked host about Check in, but omitted above information.
Place wasn't dusted/cleaned.
Unfortunately overpriced, but it was out 1st time at Madrid.