We had a great stay at the apartment! It was very clean, comfy and the interior is cozy. It had everything we need, even washing powder for the Waschmaschine. The location is great, close to everything, but be aware that the apartment is right next to the Castello so it’s a lot of walking uphill, but that’s everywhere in Lisbon.
Like in the other descriptions mentioned there was a little smell coming out of the shower when you used the toilet. We stayed in other locations in Lisbon and had the same problems, so I think it’s because the city is old. It was only for some minutes and we kept the door shut (and the window open) so it didn’t bother us.
One side note: because the building is very old, the door frames are low. I’m 1,86 and hit my head on the first day a couple of times, so if you’re tall, learn to bend down when entering a room 😉