Carly's apartment is in a very nice, but also 'strategic' location. Not dead-centre (away from the noise), but close enough - it's a nice 30 minutes walk to the centre. The railway stations where you can take trains to the beaches or Sintra are also at walking distance. Don't feel like walking? Plenty of bus connection to take you anywhere you want.
We really liked the place. The apartment is quiet, clean and comfortable. It has anything one needs. The people at the reception are friendly, communicative and efficient..The stay in Carly's apartment definitely made us fall in love with Lisbon even more.