Juan's place is very nice and clean. It was very easy to check in and out with no problems.
Communication was great and Juan will answer all of your questions.
He provided everything we needed (iron, hairdryer) but you might need to buy more toilet roll if you stay longer than two nights.
The location is perfect as you can walk loads of restaurants, bars and tourist spots. However being in a great location also brings a lot of noise at night. We came prepared and brought ear plugs, this really helps as I couldn't hear anything. The beds are very comfortable.
I would recommend this place in Madrid and would stay here again.