Hugo & Ana's place is in a great location right in the heart of Lisbon, close to anything you may want to get to.
Communication with both of them is excellent and easy as well - I only met Hugo a couple of times at the apartment and stayed in touch with Ana by message and they were both very warm and prompt.
The apartment in itself is well-stocked and stylish, plus has some great views of the city.
I would definitely recommend staying at their place during your next trip to Lisbon!