This is a great home base for a stay in the historic areas of Lisbon. Is in the Alfama district directly intermixed with all kinds of restaurants, cafes, shops, etc. A tram stop of the famous #28 tram is about 2 blocks away. The unit itself is down at the bottom of the hill so really to find your way back from a day of exploring just walk down hill and you'll either find yourself within a couple of blocks of this unit or a short (and flat) walk east or west along the waterfront to get there.
As to amenities both the 2nd bathroom and the clothes washer are kind of rare in that immediate area I would think so that's a bonus. The 2nd bedroom is definitely a kids thing as it's a loft with very low ceilings but kids will love it and really a younger adult crowd won't have any issues either. The main bedroom as a nice little room with the 2nd bath attached. Showers are nice and hot as well.
Only cautionary message would be around the stairs to the unit. This is a loft unit and is on the 4th floor with some very steep stairs. If you have any mobility issues this will almost certainly be a problem. If you're simply not used to stairs you'll be absolutely fine but worth noting. I'm 61 and basically typical American. I cursed them the first day and then started thinking this was good exercise by the second day (as is all of Alfama)!
In all a really lovely place as you can see by Maria's photos. The unit was as shown and an exceptional location whether roaming Alfama or districts further away like Baixa or Chiado.