Our stay in Venice was wonderful. Although we didn't get to know Mario himself the conversation was easy and he answered right away.
We got the keys from a women who didn't talk much and didn't explain anything, so our first impression was a little negative.
The apartment is located very central, so you can walk everywhere easily.
It's very nice furnished and contains almost everything. The only things we didn't like were the musty smell when you get in and the floor that didn't seem to be cleaned very well.
But all in all we can really recommend this location. Thank you Mario :)