I think there will hardly be better choices than Marco's apartment on airbnb in Venice. We are a group of seven adults and we stayed 4 nights. It was overall a fantastic experience. First of all, you can't possibly beat the location: it is a 5-min walk to Rialto bridge and 10-15 min walk to San Marco (not including window-shopping, photos, stop for expresso...). The apartment is huge with Venetian Art Deco style from head to toe. The living room looks just like that in the pictures. The bathrooms are both huge and gorgeous. The kitchen is well-equipped with more than enough kitchenware for a large group like us. All the electrical appliances worked out fine. The host, Marco, answered my question promptly before check-in. Our trip to Venice wouldn't be so unforgettable without this home away from home. Grazie mille, Marco!