Very enjoyable stay at Didier and Magarida's apartment. The description is accurate and found no fault.
This is a 2 floor apartment with narrow stairs - no problem for us - but for others who don't do stairs well or have big heavy luggage it could be challenging. The apartment living room, dining room, kitchen, standup shower and WC are on one level, and upstairs is a big bedroom with 2 twin beds that can be pushed together and separately a small sitting area with a TV. There is also a 2nd bathroom with a tub / shower combo. Overall great stay and the location is excellent - very convenient to the subway from the airport (change at Alameda), and 7 minute walk to Rossio station (Sintra), and 5 minutes to Praça Commerçio. The start of the Alfama is just a few yards down the street.
A couple of quick other observations: there are lots of electrical outlets - so plenty of places to charge your electronics. There are two electric heaters (one upstairs and one downstairs) and they work well and quickly to warm up the apartment if it gets cold.
Thank you again Didier and Margarida for a comfortable stay in your beautiful city!