GreatStay is an amazing place if you want to have a nice stay close to Lisbon's city centre. The rooms are big, full equipped and the hospitality is great. The bathrooms are spacious and comfortable and the kitchen has everything if you wish to save some money and prepare a few meals.
Celso is a very preoccupied host, which is very attentive and ready to help at any time. He is very nice, comprehensive and flexible, which are great qualities for a host that does anything to please their guests and to make sure we have a nice stay.
There is a pleasant attention on cleaning the flat, which according to my experience in similar lodgings in Lisbon, i did not find nowhere else. I definitely recommend this place for a quick city-break in Lisbon.