We thoroughly enjoyed staying at Vesper Apartments. The location was perfect for exploring Alfama old town and walking along the front. Turn up the first cobbled road next to the apartment and you're directly in the Old Town, surrounded by quaint, cosy restaurants and bars. We loved exploring the Old Town and listening to the Fado music around every corner.
The apartment itself was lovely. It was very clean and decorated well. It's easily accessible through a door next to a small convenience shop (which ideally opens late!) We didn't spend much time inside, but it was the perfect base for exploring Lisbon. The shower is great and very powerful! The bed was comfy. As mentioned in other posts, the drains can smell a little, but this seems to be typical of Lisbon's old pipe networks and can easily/quickly be remedied by opening the shutters.
There is a road outside which was perfect for jumping into Ubers to quickly get to other districts (very cost-efficient and quick!). Despite the road, there was barely any noise when the windows were closed. We slept very well and undisturbed each night. Throughout our stay we felt safe, secure and lucky to have found such a gem of an apartment right in the heart of the old town. Thank you Alexandre! :)