The company that operates this apartment and several others does not allow for the flexibility of a check in later than 11pm. I had to go back and forth a number of times with Venice Apartments as they have multiple people working on each booking and received different information each time. Though the late check in portion is in the details on their Airbnb page, as a Airbnb host myself it is imperative, especially for a newcomer in a foreign country, to be as amenable as possible to your guests. It would be nice if this was a possibility as several late flights do arrive at Marco Polo after 11pm.
On the other hand, if you are interested in attending the Biennale, the apartment is literally right next door to Arsenale. Lastly, there is no wifi in the apartment.