Staying in this place was very convenient for us. Nearby bus stops, markets, the LX Factory that have lots of good restaurants, and it was very easy moving around the city from here. It seems that he place has been renovated recently and everything was very clean. Beds were comfy, the kitchen had all we needed, and overall it was perfect for 3 travelling friends :) I would definitely recommend it and stay there again.
The only thing that bothered us a little bit was that some times the power dropped when we were cooking, even though there was no other home appliance being in use at the time. But.. just details, compared to the convenience of being there.
Also mind that Lisbon is an old city and this apartment is on the 3rd floor. So you'll have to work to bring your luggage up and down the stairs. No lift available.