Great apartment, excellent location, loved my stay in the end. But for a mid-winter booking I recommend asking the host to put the heating on a day or two before arrival - just to avoid the challenge of balancing enough electric heating on to warm the place up sufficiently against the electricity outages this causes because of Lisbon's poor electricity reliability. Because in the end it was fine, better than fine, but a the beginning it was enough of a shock and inconvenience to make me scout alternatives.