Great apartment, great location and good neighborhood in the middle of the Old Town Madrid! We didn't use a metro at all since we're able to walk around to all the attractions and restaurants. Apartment was very comfortable, except for the lumpy mattress in the main bedroom. If you don't have a dark blue, very thin mattress in the large bedroom, then you should be all set!
The application to open and close the doors is wonky to set up, but once it is working, it was practical to use. If you have problems with the application loading, staff are able to upload manually if you send them an email.