Great communication and our late arrival was no problem, the extra fee for welcoming us late at night is very reasonable. The location is fantastic, 5 minutes to the Piazza if you're into that, but for Biennale visitors this also means you're actually faster walking there than taking the vaporetto (or walk at least to San Marco and then hop on the vaporetto). Plus there's a super market just around the corner, open every day until 10pm.