Despite having a hiccup on arrival where the door to the apartment wouldn't open and we couldn't get in, the hosts were very apologetic and helpful in getting it resolved. They looked after our luggage while we went for coffee until the lock was fixed and we were able to get in. One thing to be aware of is make sure you are given the entrance code for the apartment on check in! There should be no keys required if the codes are correct!
But on to the apartment - and I have to say it was stunning. It was much bigger than expected, nicely decorated with massive rooms and high ceilings. The rooms had air conditioning which was vital and we had on most of the time. The bedrooms were spacious, as was the main bathroom. It was useful having a second toilet room too. The living room was huge with a large dining table and space to relax and unwind. The kitchen was modern and well equipped.
Location wise, it's perfect. Just a few minutes walk from the shops and restaurants in the centre of the old town, 10 minutes walk from the nightlife of Bairro Alto, 15 minutes walk from the train station/ferry at Cais do Sodre. Whilst it was located in a busy tourist area we never noticed any outside noise and with windows and shutters closed it was very peaceful.
We'd thoroughly recommend this apartment to anyone visiting Lisbon, especially if you are in a group or a family and visiting for the first time.