Nice rooms and location.
Free river taxi
Excellent Diamond lounge food and drinks.
(However overzealous staff. When I left the lounge holding a glass of wine. He actually ran into the elevator and grabbed it from my hand. Free fruit basket and bottle of champagne because of this.)
Small rooftop pool for posers and/or screaming children. Great view of Venice. Do not expect to swim when busy. Refreshing though.
My favorite pizza is in Venice.
Casin Dei Nobili