My boyfriend and I stayed here in the last 5 nights. Diana was super communicative with us the entire time. Even though check-in was at 3 pm, she allowed for us to leave our baggage at the apartment while it was getting cleaned.
The place itself is amazing. Looks exactly like the photos. It has everything you need: kitchenware, heaters, washing machine, dining table, etc. Only down side was that we didn't have a place to hang our towels within the bathroom, but we used the hanger within the bedroom. Another con of the apartment was that the wifi was excruciatingly slow.
The location was perfect: just a stone's throw away from the Santa Apolonia railway/metro station - so it was extremely convenient for us when we arrived. The location is right in Alfama, which is an amazing area to stay in. There are many fado bars down the street, and a short walk away from the city center.
Loved our stay here (despite slow wifi)!