We really enjoyed stay at Catarina's apartment. First of all, she's a great host and cared a lot about us.
The apartment has a perfect location, it's very close to main sights such as Santa Justa Elevator or the Castle. It also takes just about 5 min to get to metro or tram 28 first stop.
The apartment itself was very clean, well equipped though a bit small as for 2 person. There were for example towels, microwave and even basic cosmetic. Wifi worked great. The only bad side is that there's no daylight. Although there are just 2 small windows all you can see is an adjacent building :( Because of it, it was dark inside. Despite it, I really recommend staying there! That's a good option for those who spend only nights at apartments :)