Arelis was a nice host, despite of a slight delay to meet us. Ca'Donzela is a very convient apartment located in the 2nd floor (stairs but they're flat and not high). We were in 7 people being 5 adults and 2 kids, a baby cot was provided which helped a lot. Linens good quality. Internet was unstable which was annoying and required often restarts.
The better part is the location: easy to find, only 100 meters from the rialto-mercado stop, no bridges, no stairs, no dark and slim alleys to cross. We got from airport using atvo direct bus and getting the vaporetto 1 straight in the piazalle rome (where bus stops). In less than 45 minutes we reached the apartment.
No hidden fees, no bureaucrecy, evrythibg vert easy. I would reccomend anyone to stay there.