Marius's apartment does have a wonderful view, is light-filled, and is very clean. Marius also is clear in his listing and provides thorough information when prompted. I do think a few bits tainted our experience compared to others. 1) Upon arrival the street had enough persons hanging about to make the key retrieval from the lock box uncomfortable. We are experienced airBnB/hostel travellers and were surprised at how uneasy we felt coming back to the apartment in the late evenings. 2) The 4 flight staircase to the apartment is tight and very dark - perhaps there was a light to be switched on but we were not made aware. Cell phone lights were necessary no matter the time of day to avoid a twisted ankle. 3) The apartment is very hot in summer and windows cannot be left open. A large fan is provided, though we remained uncomfortable. 4) Finally, while the apartment is well-equipped with all you need, we did not appreciate condoms left out for us. Maybe that says more about us, but it certainly set the tone of the host and we were weirded out - we tossed them immediately.
In short, has all the makings for a fab stay but enough things were off that we wouldn't go back given all the options Lisbon has to offer.