I thoroughly enjoyed my stay at João places during my time in Lisbon. It's central to everything. Great food, great views, great transportation, all in close proximity to the residence. It's also close to a lot of bars if you don't mind a little noise. But it was never too loud to disrupt my sleep. Marieta was very helpful in explaining everything in detail regarding my stay and points of interest. As well as a few insider tips. I'd definitely recommend staying at this residence for your trip. I actually would look to stay here again if I make another trip to Lisbon.
P.S. Check under the bed for the extra toilet tissue rolls so you won't go out and buy more when you didn't have to.