This is a fab place and Efrain was an amazing host.
The apartment is excellent, a 3-bed place with everything you could need for staying in Lisbon. Efrain is really fun, helpful and an excellent host!
Alfama area is also great, it's about 15 mins walk from the centre but Alfama itself is worth it, because it's slightly off the beaten track it has way fewer tourists and there are lots of greta bars and restaurants to see