We had a wonderfull stay in this apartment in the heart of the old town (Alfama). Finding its location is quite difficult due to the street configuration that is not completely mapped in most of the maps. I would suggest to give GPS coordination in addition of the address. This could be very helpfull.
Mafalda is very nice and gave us a good welcome. She also had very good tips to share with us. We particularly loved the big market and the few restaurants in the neighbourhood! :)
If I had to come back in Lisbon, I would definitely contact Mafalda again! :)