Marta's place is very spacious and very comfortable, and located in a lovely area of Cannaregio. Her apartment is located on the second floor so it is a climb especially if you have bags.
Marta got a bit crabby with me when I visited during Venice's hot spell as I asked for AC as soon as I got into the apartment. I guess she thought I was too impatient but she was nice and got me a fan when I said the AC was not cooling the place down.
She also did arrange someone to carry my bag up the flight of stairs for 12 Euro.