Nice and clean apartment - the pictures give a fair impression.
We stayed 2 people in 5 nights, and didn't really miss anything.
Not in the very center of the city, but within walking distance (and close to a Metro station).
Restaurants and shopping at hand.
We were met with great flexibility when checking in at the middle of the night due to a delayed flight - and could keep our luggage safe after checking out.
The apartment is not packed with fancy stuff, but everything in is working.
I would hesitate to book it again, if going back to Lisbon.