I stayed at Francesca's appartment with three for four days in December 2011. The place is great: clean, plenty of room, well furnished kitchen, good shower... On top of that, Francesca is a lovely host—she even presented us with a panettone for a welcome gift. :)

The flat is located on the island of Lido, not Venice itself. Access is very easy though: there are boats every 10 of 15 minutes or so, taking you to different destinations in the city in 10 to 25 minutes.