The check-in was uncomplicated and Marta showed us everything and gave us helpful tips for our visit to Lido and Venice.
The apartment is located about 30min by boat from the airport, 5min walking distance from the boat- terminal to Venice (which takes about 15min to San Marco and goes regularly 24/7) and 5min walking distance from a beautiful beach. A super-market and nice restaurants are near the apartment as well. Everything was clean and you have everything you need for a wonderful stay.
I would definitely recommend staying with Marta as you can combine a beach vacation but still be in close proximity to Venice.