Loved Tatiana's tram house apartment! I didn't find it to be overtly noisy at all like others had stated - in fact, once you're in the bedroom, it's like a quiet, peaceful oasis. There is some music from the LX Factory that comes through the kitchen area some nights, and of course the hustle and bustle of public transport in the front of the apartment, but they're the sights and sounds of Lisbon :) (and not too noticeable).
We loved the old traditional Lisbon door that took you up to the apartment, and the lovely windows where you can get some amazing light. The apartment is more than spacious enough for two people with a large kitchen area AND a washer (a huge plus after traveling for a few weeks). The location admittedly wasn't my favorite, as it took a bit of time to get to the places we grew to like (Alfama, Alto Bairro area), but public transit is easy and it's right in the middle of the Belem and the more commercial areas which is very convenient. Would stay here again!