We had a great time in Lisbon - the flat was perfectly located, very clean and easily accessed. Rahim was very helpful in getting us checked in and had wonderful tips for us! Lisbon is a brilliant city; great food and plenty to see and do. The balcony was great to have for breakfast in the sun, and we loved having space to ourselves to relax in after walking all day.
I would warn that there was quite a lot of street noise to be heard in the bedroom (sirens and shouting, and mostly Saturday night to be fair which just shows what good nightlife Lisbon has!). It didn't disturb us too much, but worth being aware of if you were bringing a small child or something. Otherwise - really great flat, comfortable, clean and well located :)