We had a really nice stay in this Apartement.
It's located near the LX Factory as many already described. To Belém we needed about 30 Minutes by foot, its only one train station away. There's also a train that takes you directly to the beach in about 20 Minutes. It's a little further away from the city center, you need about an hour to walk there.
The Apartement was clean and cosy. We had a warm welcome from Miguel and his family when we arrived and he always responded quickly to messages.
In the Apartement you here every plane that flights above the city and every person who walks by outside, so if you're a light sleeper, you should bring oropax with you.
Otherwise we had a great time and can only recommend it.