We stayed at this duplex (CHI22) for 3 days over the long weekend.
Location - It's very conveniently located in the Chiado area, steps away from Santa Justa Lift. It's across from H&M on the 4th floor. You can also easily walk to nearby attractions.
Transportation - Nearest metro station is Baixa-Chiado (Blue/Green line); nearest train station is Rossio.
Size of space - The size of the apartment is quite small but comfortable. There are two large beds - one in the bedroom and one up in the loft. There's also a sofa that can pull out as addition bed.
Amenity - The apartment offers most of what you need. However, we do find the electronic water heating pot to be a bit rusted. Would recommend replacing with a standard coffee machine to be used for hot water/coffee.
Comfort - Most of the furniture are from IKEA. The bed is comfortable, not too soft or too firm. However, it's quite warm in the apartment and there's no central A/C...