There were 15 of us staying in this apartment for 2 nights. It was plenty big enough for what we wanted. The apartment is in a great location, extremely close to all the night-life and restaurants, but not so close that you are disturbed at night time.
It was very easy to communicate with João throughout the whole booking process and lead up to our stay. He was very useful.
Would highly recommend this place to a group who are thinking of planning a trip to Lisbon.