Sara was a great host even though we did not meet her. One clarification regarding the 4th floor- the steps include 4 flights of 24+ steps on each flight. The space is very nice, and the views are worth the effort of the steps.
The map and directions given were very detailed and thorough, however I was hoping to pull them up on my phone when our boat arrived but had issues with phone signal, so would recommend to print, as they are very necessary.
Overall a wonderful experience and I look forward to returning to Venice!