We had a lovely stay in this appartement.
The surrounding area is a bit noisy at times so bring some earplugs and you'll be fine.
Beds are a bit small but we (my morgen and I) each had are own bedroom so that was not a problem for us. Airco is nice, but on really hot days not sufficiant I think.
Cristina was great, she showed us around and made us feel right at home. Appartment was clean and very well kept. Located near all the great places in Lisbon. Would recomment it to my friends.