A great apartment, the location is superb - easy to get to from the airport (we went by metro), a great view of Rossio Square and close to all the other attractions. Nelson was a great host, communicated clearly and responded quickly to any questions.
Only one slight negative was the shower - which in itself was really good - but it does make some strange noises and did smell slightly, certainly not enough to ruin the stay though.
I would recommend this apartment to anyone visiting Lisbon!