Perfectly located apartment for amenities and transport, great bedrooms for our 2 adult, 2 children family and really great communication and customer service from the hosts.
Be warned it is a busy noisy street with noise into the night, though the shutters do significantly block out the noise. There were guests in the apartment upstairs who were making a lot of noise, one night we only managed a couple hours of sleep before a 6am wake up the next day!
The first time we opened the bathroom tap the water came out brown... We were told this was unusual and may be because the apartment hasn't been used in a while, which makes you wonder about the cleaning immediately prior to our stay, although the apartment did appear clean. It put us off drinking the kitchen tap water though, which is drinkable in Lisbon.
A colleague of the hosts, Tico was very helpful both at check in and after check out when we had stored our luggage at the hosts office, close to the apartment.