We had a wonderful stay at Daniela's apartment!
Location: perfect. The neighborhood is lively but the apartment is on a street away from the noise. A short walk to bus and tram lines and the taxi stand. There is also a little mini-market close by in case you need snacks or supplies. And a restaurant directly across the street in case you don't want to walk at all!
Apartment: we were 4 adults and the space was a little tight, especially having to go through the bedroom to reach the bathroom, however for just a few nights it was not a problem to be in close quarters. As some other reviewers have said, being a basement apartment it can feel a little damp inside (especially after it rained most nights we were there). But of course using the air conditioner helps this a lot.
Daniela: she was an excellent host, and we communicated easily even with a language barrier. We had a couple of little hiccups (such as not knowing how to use the dryer) but she was readily available and willing to help.
I would definitely recommend the apartment to others and would absolutely stay there again.