A very nice flat at the fifth floor of a town house a few steps away from the busy city centre of Lisboa (which you can still reach in appr. 15 minutes - that's absolutely okay to walk or you can take the bus [bus stop almost right in front of the house]). The view from the rooms with sea view is truly amazing and the bathrooms were very clean! Spacious enough rooms, not the comfiest of mattresses, but alright.
The check in is not very flexible, so you really have to be there between 1 and 3 p.m. or later between 9 p.m. and midnight. But you can for example lock your luggage at Cais do Sodré and explore the city from there if you arrive early.
All in all a very nice place, reasonable prices and also ideally situated to go to the Cemitério dos Prazeres (by bus), where the Tram 28 starts, which is the perfect tour around the city or at least to get a first glimpse and inspiration where to go and what to visit.