Tomàs was very helpful and responsive, providing us with clear instructions and allowing us to leave luggage at his office when we arrived before the check-in time.
Although you could easily miss the unprepossessing entrance, the apartment had a lovely feel: it was spacious, light and well-equipped - with a nice bathroom. It was conveniently located too, within walking distance of various attractions (such as the Livraria Lello) and great bakeries and bars. This did mean it was rather noisy on a Friday night with bar crawls (ok with the windows shut but best to take good ear plugs if you are a light sleeper).
Overall, we had a short but pleasant stay and I would recommended the apartment if you need a comfortable base in the city.