Although we didn't meet Martina, and Mimi had another appointment they had organised Signor Eros to meet us at the Rialto and help us with our luggage to the apartment, which was incredibly helpful for first time visitors to Venice.
The apartment was lovely - comfortable and with the best equipped kitchen during our visit to Italy. The only drawback, which I hadn't checked, was the 51 steps up to the apartment - however, our view of gull chicks being fed on a roof across the alley was a bonus.
Location is good - use Google maps and then follow them carefully - and Rialto is about 9 mins away - as is San Marco.
I really hope to be able to visit Venice again and would have no hesitation in recommending Ca'Eugi

Anne