Marcello and his place were both great. He met us outside to guide us to the right spot and gave us a tour of the whole place. He even had the table set and the espresso maker out for us complete with croissants for our breakfast the next morning.
The location of the apartment is great. It is right off of a side street to the main road, so it is quietly set aside, but you can access any restaurants/stores/people watching in 5 seconds. Also, some of the main attractions like San Marco, the Grand Canal and the bridge are about a 20-25 minute walk and the whole city is very very walker friendly!
We also walked to the apartment from the trains station and it only took 15-20 min.
Highly recommend!