The flat has everything you need for a short or long stay in Venice. It is nicely tucked away from the busy areas of Venice. If you are staying to visit the Biennale - great, the flat is located nearby, just minutes away from the Giardini. There is a lovely restaurant and shops just around the corner.
We loved staying there for several reasons. Roberto is a very lovely host, it is quite and less touristy area, the flat has a very cosy feel to it and it is spotless!!! Very comfy beds, too. There is plenty of free space because of the park opposite of the flat. Great for kids!
If you like to be away from the masses, than the area of St Elena is your place to be.