Lucy & Mat's place is PERFECT. I spent my birthday here after a week of traveling around Portugal and I cannot describe how refreshing it was to stay in this GORGEOUS, homey apartment. The views are even better than the pictures here and there are so many lovely, thoughtful little touches to enjoy. Location is excellent and even the parts of the city that are farthest away are only about a 25-30 minute, lovely, scenic walk. We did not get a chance to meet Mat but we did get to meet Lucy when we arrived and she is absolutely wonderful. She was incredibly communicative before and during our stay--sending guides to help us plan what to do in Lisbon when we booked and answering my millions of questions like she was my 24-hour private concierge, and just an absolute joy to talk with. Our only disappointment with our stay here was that Lucy had her own life to live and couldn't just hang out with us for our entire stay :)
They mention in the listing that they have 2 dogs and a cat downstairs in their apartment (so not where you actually stay). I have terrible dog and cat allergies and I had 0 problems while I was there (except when I sought one of the dogs and snuggled it a little... but that's my own fault...). So if you are considering this apartment but are concerned about dog and cat allergies I wouldn't worry about it-- the pets don't seem to ever enter the part of the property where guests stay.
If you are looking for a place to stay in Lisbon and there is availability here -- BOOK IT!