João’s place is a wonderful place in an unbeatable location. We literally walked everywhere (there are lots of going up and down hills, but hey, that’s Lisbon). You can also use public transportation which is very easy to access: Bus stops are a few hundred meters away and metro station is quite close.
There is a restaurant downstairs and construction work in the building across the street; so it may get noisy from time to time. If you’re sensitive to noise; having a pair of earplugs would be very helpful.
Lastly, keep in mind that this is an old building representative of typical Lisbon city life. So there may be some minor inconveniences (like the funny smell from the drains) due to that. João is always accessible, ready to answer your questions and help with any issues you may have.
One final note: If you like coffee and ice cream; try Copenhagen Coffee Lab and Nannarella around the corner!