Joao and Vera were great hosts and the apartment is perfect! From the moment my girlfriend and I arrived we felt at home. Vera spent over 30 minutes taking us through some of her recommendations for the city and showing us everything on the map which was really nice. She also stocked the fridge with wine and some bread/cheese which was great too.
As for the apartment the location of the is great and easily accessible to most sites. If I had to nitpick, the house is on a bit of a hill which isn't much different from the rest of the city (Lisbon is extremely hilly), not horrible but worth noting. Also it's on a reasonably busy street corner, which with windows open can be a bit noisy, however we just closed the windows at night and it wasn't a problem. Vera provided a fan which did the trick, however we visited in late September so the weather wasn't that hot, I could imagine if the weather was ever really warm say in the summer, it could potentially be an issue but maybe not. Again just worth noting if you're hyper sensitive to noise and or sleeping in a closed apartment.
The internet is great we were able to keep in touch with family home doing a few video chats (in case you were wondering).
All in all great experience, I would highly recommend staying here. Great value for what you get!