Mario’s place has the main thing - location! It couldn’t get better with 5 minutes walk to San Marco square. It’s set in an impressive historic building and offers a huge stylish space. The only things I would change were the bathroom being little basic and no tea / coffee facility. Most people wouldn’t be concerned as Venice is for visiting and not staying in a hotel, but I drink hot water before and after sleep so I did. We and my son had a wonderful stay though.