The apartment looked nicer in photographs so we were a bit disappointed at first. However it was functional and just what we needed for those few days.
It was between 24-28 degrees in Lisbon but the flat kept cool (that's the prize of going up three floors... so be prepared to walk up the stairs after a long day in that gorgeous city).
The beds were very comfortable (even the sofa bed). Bathroom was a bit tired but they provided towels and toiler paper as well as few things for the kitchen which we barely used.
The only issue we had were the keys. There were only two sets and we were three friends doing different things during the day and meeting up for dinner. One of us had to be dependent on someone else if he or she needed the flat during the afternoon.