We had a great time at Olga's place. The apartment was well equipped and had everything the six of us needed to be comfortable. The lounge room was great for 'hanging out' after busy days, and the kitchen let us sort breakfast most mornings and even an emergency meal when everything was shut on Easter Sunday. There's lots of restaurants and supermarkets close by. The 28 tram is also close, although it was very busy over the holiday weekend. It's a bit of a walk to the nearest metro, but do-able. The Aloma bakery just up the street was a regular start to our days for coffee and award winning pasteis de nata to rival Belem.
Olga's and Joao were really helpful - full of local tips and happy to arrange taxis to the airport and station for our various departures.
We'd happily stay here next time we had a big group in Lisbon.