We had a really nice time in Lisbon. The apartment is really well situated and everything we wanted to see we could walk to or take the train. Diogo and Carlota are nice people and very thoughtful.
The only downsides are the main bed is REALLY firm and you can hear everything that's going on in the neighborhood from inside the apartment. Normally that wouldn't really bug us, but there's several buildings nearby that are under construction so it woke us up at 8 every day.