Brian responded to my booking pretty much straight away, was very helpful providing with flat details, and replied to every message within half an hour or so.
On the arrival we were met by his colleague who showed us to the flat.
They also offered a city map and the list of things to do in Madrid.
The flat is located just 10 minutes walk from the center with a few little supermarkets within a walking distance.
Though we haven't used it but Brian also offers a free of charge locker for those who have a late flight, which I think it's a great added bonus for the Airbnb flat.
A few things to take to consideration though:
We were in Madrid in early March, with +3 at night and +7 in day and it was quite cold in the flat. I think the boiler is just not powerful enough. Also, as we were four girls we had to have rather quick showers to make sure that everyone has a hot water.
The pillows in the second bedroom might need replacing , though they were fine in the master bedroom and both beds were comfortable.