The apartment was exactly what I was looking for. The wifi was fast enough for me to work from and take meetings. The location was amazing, I could walk to Chiado, Barrio Alto, Baixa, Alfama, all in less than 20-30 minutes, and it was very close to a public train stop. Unlike some other reviews, I found the unit to be comfortable inside (not too hot or humid), and not too noisy.
The checkin process was a little difficult. Alice (the neighbor that you get the keys from) didn't seem to be expecting me. It was hard to tell if the miscommunication was between me and her or her and Sergio. It made for a tense 20 minutes or so. Fortunately it all ended well and I got into the unit.