We had a great 4 night stay at Carlos' apartment. It really does feel like a home from home with everything you could ever need - including coffee maker, washing machine, drying maiden.. everything! Apartment is bigger than it looked in pictures and all of the little touches really make for a great stay. Reliable WiFi, brilliant water pressure in the shower despite being 4th floor (although cubicle is a little on the snug side if you are of a larger build!), air con in bedroom & lounge. Location is great, more of a local area than tourist area but walkable into the centre. Can't comment on public transport nearby as we didn't use it - we walked, cycled or grabbed an Uber when we needed to.
Definitely worth the 10 min uphill walk to Maria Limao cafe for breakfast/brunch - pancakes, crepes, smoothies - all to die for!
Would happily stay here again if in Lisbon and would recommend anyone to stay. Check in was brilliant too - Carlos met us at the apartment, despite us not arriving until near 1am, and came to see us off when we were leaving. All great from time of booking to the time we left :)