Great location - walking distance to almost everything...minutes from TimeOut which was very convenient and also bar and other restaurants. It still manages to stay quiet though, so no need to worry about noise.
Great host - very responsive, replied to our messages in minutes and allowed us a super late checkout which was really nice.
Our group skipped over the part of the listing that said "there are no windows in the bedrooms" when booking, so take note of this if you're claustrophobic because one of us had a problem with this. However it is a well ventilated apartment with AC (which is rare in Lisbon).
The apt is stocked with all of the things you need for a great stay, towels, soaps, linens, etc. Will definitely recommend this apartment.