This is a beautiful apartment. Very classy and comfortable with all the amenities, including a carpark stall, supermarket underneath and lovely French restaurant within a 1/2 block for breakfast and nightcap. The location couldn't be better - close to everything but quiet at night. This was a new listing and there weren't any reviews so we were taking a chance, but It exceeded our expectations in every way.
A couple things to note - Lisbon is not an accessible city in general, and this apartment had 2 flights of stairs. Not a problem at all if you aren't handicapped. It is on a hill - as is much of the city. This place is probably better than many, from what I've read.
Also, they asked for a $250 deposit on your credit card upon arrival. It threw us a bit - as AirBnB recommends no dealings outside of their site, however, it was a non-issue in the end but something you may want to be aware of if renting this place.