I stayed at Debs apartment in Chelas for one month. The apartment itself is very nice, clean, fresh, it has everything a person needs to stay for a short or longer period. However, even though i loved the apartment the area it is in is quite isolated from the heart of Lissabon. There really isn't a good way to walk to the metro and there is only a bus that is hard to catch. The area is calm but i did not feel comfortable walking around. If you are two people this apartment is a great alternative but i would not recommend it for a single woman.