This is a good stay in Lisbon. The location was quite good. It was situated on a quiet street, so noise wasn't an issue at all. However, it was also near a busy street with lots of restaurants, shops and a couple of nice parks as well! With regards to the apartment itself, it was well equipped. The bed and sofa-bed were both comfortable. There was a washer and dryer which was extremely handy as my friend and I weren't traveling with a large wardrobe, and we were burning through clothes given the hot weather. Our only complaint with the place was that it was very damp. This might've been due to it being a basement unit. Thankfully, there was a dehumidifer which helped control things, but there was a dampness smell that we couldn't get rid of despite having it constantly running.
Overall, I would recommend this stay in Lisbon.