Lucio's places is exactly the same as the descriptions and photos. Building is old but it adds to the charm :) Lucio arranges so that he meets you at the vaporetto stop and walks with you since the streets in Venice can get real tricky. It was about a 10 min walk from the Arsenale stop (we walked pretty slow with luggages) - once we got used to the road and the directions, it took us only 5-6 min to get to the flat from the vaporetto. We walked from the flat to San Marco plaza and it took us about less than 30 min (the first time we got lost, of course and walked around in circles, lol). All major places are definitely walkable, but vaporetto stops are very close by (Arsenale and S. Zaccaria) so getting from and to is fairly easy.
The only thing is the flat is on the 2nd floor and stairs are pretty narrow - if you have large/heavy luggages, make sure you can handle them during check in and check out.
PS. Please make sure to stop by the restaurant Lucio recommends - it was easily one of the best meals during our entire Italy trip!

Thanks Lucio for the comfortable stay!