Lapa Palace is a bit removed from the central part of Lisbon, since it's in the embassy district. However, taxis are quite reasonable in Lisbon. If you're only going to be in the city for a couple of days I would highly recommend a stay there. It's quiet, the rooms are lovely, the grounds are beautiful and the food/service is impeccable. Just relax and enjoy! We had been to Lisbon several times, so that's just what we did.