We eventually found Maria's room after using misleading information supplied by Airbnb on their reservation receipt. On her Airbnb page, Maria's description of how to find her room is very detailed and accurate. It is very close to the main Venice St Lucia rail station - a perfect spot. However, her description is not on the receipt, which refers to an address of Sestier Santa Croce, a totally different house. Guests should make sure they print out Maria's description separately.
Maria's room was small, but adequate for two people. Very few amenities though. No TV, no kitchen or tea/coffee making facilities (as advertised). There was no internet or even mobile phone coverage in the room. Maria makes a separate arrangement if you need it to use her own facilities next door. There is also no air conditioning, which means the room could be very hot and stuffy if the temperature was much higher than when we stayed.
On our arrival, Maria provided limited information about what to see and do. She happily responded to our questions, though, and suggested a couple of good places to eat in the back streets. One other suggestion was very good, which was to get on to the atv water bus (number 1) at its first stop (prior to the rail station stop) which enabled us to get a front row seat cruise through the grand canal, rather than standing room only if we had got on at the rail station stop.
Maria provided a light breakfast each morning, which was a very enjoyable treat.