Two hard weeks of worklife later, our stay in Lisbon seems already a memory from long ago... But it is a really nice memory! We enjoyed the city a lot and were very pleased to stay in Alfama, an authentic part of Lisbon. We preferred it to the other neighbourhoods we saw. It was very near to the city center and it gave us an impression of a the real life in Lisbon. Not for people that don't like climbing in the small streets. :-)
The map and the addresses the owners - they speak English very well - gave us (and lots of extra information) were very useful. It gave us the possibility to visit the city in a different way than other tourists do. We especially enjoyed the seafood in Boca de Inferno!
It was our first airbnb, but it's certainly a concept we like and we will try again.