I stayed at Diana's apartment for 7 days and I could not have asked for a better place to stay during my first visit to Lisbon! The apartment was exactly as described, clean and spacious. It has everything you need to feel comfortable during your time in Lisbon. The wifi and AC worked great. The location was perfect - just a 7 minute walk to central locations, such as Rossio Square, Cameos Square, the main shopping avenue and the Baixa-Chiado metro. It was also a 10 minute walk to the Cais do Sodre train station and the Time Out Market (a MUST for any foodie!). Jorge was there to meet me upon arrival from the airport. I felt very safe during my stay there.
The only slight downsides were the door lock (took forever to unlock or lock the door), as well as the stairs to the apartment from Rossio Square. It wasn't a problem for me, but would be challenging for anyone with mobility issues. Also, was a bit noisy at night (to be expected, given the location), but nothing some earplugs couldn't fix.
Otherwise, I loved my stay there and would love to stay there again if I return to Lisbon