We had a great stay in Miguel's apartment. It is exactly like the pictures - big and spacious and bright despite being in the basement, with all the amenities you'd need. The fact that it is in the basement meant that it was always cool which was great. I imagine that it could get quite cold in the winter but we saw there was plenty of heaters around. It was a great location, a little walk from down but perfectly doable (we walked everywhere) and also right next to the metro, and a Lidl only 5 minutes away.
Miguel was extremely helpful, was there to greet us when we arrived and give us some advise on Lisbon and arranged a taxi to pick us up when we left for the airport early in the morning.
Would highly recommend this place!