Sean G.
Do the check-in steps ahead of time and it should go smoothly. I contacted them days before arriving in Venice, followed each instruction over WhatApp, paid the taxes, and sent the passport details. By the time we arrived, we had all the codes for getting in and collecting the keys. The location is very central and the place was well equipped. San Marco Suite had a slightly odd layout, as you might expect in Venice. We had one issue, messaged them on WhatsApp, and it was sorted quickly. A good place to stay in Venice.

