We had a nice stay, the apartment is quite spacious and very very well located if you want to visit the Biennale. The rest of the city is a bit further away.
There were some downsides to the apartment, it wasn't cleaned very well before our arrival, and there's only 1 AC unit, which is only able to keep the living room nice and cold, the bedrooms stayed very warm. Also, the furniture in the apartment is very minimal, it isn't very cozy.
Overall, it's a nice place to stay when visiting the biennale and when you're mostly out into the city.