I had a great night's sleep in the apartment and the shower is good! Remember hairdryer, soap and shampoo - this is mentioned in the write up but you might find this reminder useful :). I found the flat quiet, even if it has a window onto the street. A good place to stay for a few days.
This is a very nice part of Lisbon to stay - there's a square nearby with some good places to eat and have a drink and you can walk downtown or near the river easily. The upper part around the Botanical gardens is quite trendy, too. Some nice traditional cafés nearby, too for a good breakfast.