This apartment was the perfect little place for our Lisbon adventures. It is super easy to access from every direction possible, being next to Rossio station and metro as well as the trams and buses. We used these for our day trips to Sintra and Belem, but the apartment was so central we ended up using our feet for all the rest!
The apartment is a great size and has everything you need. The air conditioning and washing machine came to our aid as well.
As for amenities, everything you need is at your feet (albeit at the bottom of the steepest hill ever). Bars, restaurants and a supermarket (pingo doce) are only a mere few minutes away. We avoided the restaurants in the square in search of something more intimate. We found Duque restaurant to be a great place, with Duque Brewpub not too far for a drink after.
We definitely recommend this apartment - just be aware it is above a steep hill and many stares so if you struggle it's a good thing to keep in mind. The building is also with other tourist apartments so it can sometimes get noisy at night. This didn't bug us but something to bear in mind.