This is a perfect location for exploring the city. It's close to a public transport hub to reach close by and farther away destinations. If you like walking you can reach a lot of the southern touristic spots by foot. There are several excellent options for having breakfast, dinner or drinks in the surrounding area, and it's close to Bairro Alto.
The apartment is clean, cool and sound proof and the bed is super comfortable. I would certainly book again for my next visit to Lisbon!