We enjoyed our stay in the Frari apartment. The location (as other guests have said) is really good. A few minutes from bars and restaurants and the supermarket. The apartment is about 3 minutes from vaporetta stop (although if you can find your way, you would be quicker to walk from train or bus terminal than taking the vaporetta). It is in a quiet location and the photos accurately reflect the apartment.
The apartment is very comfortable. The wi-fi worked really well and had good speed.
The only (small) critisism we had was that there were no pots and pans or electric kettle. Having read other previous reviews, these had been available but were not there during our stay. This may be down to the fact that the apartment block had been having the stairwell refurbished which was just about complete when we arrived.
We downloaded Ulman Venice app for my iphone and used this to navigate around as it tracks your location and helps you easily work your route through all the narrow streets (which should be explored).
Silvio recommened a tour taking in Murano (glass making) and Burano (nice colourful buildings) which we really enjoyed taking advantage of the vaporetta day ticket.
We would stay here again if returning to Venice. Thanks Silvio.