We had a really bad experience with Silveira's Lofts. We checked in at 6:30pm and the apartment was filthy and hadn't been cleaned from the prior guests stay. The check in time is listed at 3:00pm on their listing, so that's really unacceptable. Then they didn't respond to any phone calls or messages about getting someone there to clean it.
The apartment itself is ok. Quite spacious and the location is very central, but that also means it's very loud all the time. There's no air conditioning, so if you stay in summer you have to keep the windows open which means you'll hear all the noise (as it's only one floor up in a very popular location). Also the shower had a major clog and flooded the whole bathroom and into the living area, plus the wifi was very spotty and would randomly disconnect.
Silveiras Lofts just came off as completely disorganized to us. When you go to pick up the keys from them (which is nowhere near the apartment by the way) they must have had half a dozen people working in their office, yet somehow they couldn't manage to clean our apartment on time for check in or respond to our messages. Very disappointing.