Alessandro's place is as advertised. It's exceptionally clean, and surprisingly spacious for a city such as Venice. All of the essentials (i.e. clean bedding, bathroom, and responsiveness) were easily above average. FYI, I'm a stickler for clean bedding and his place allowed me to sleep in peace.
As for the apartment and location, here are a few things to note. First, it's on the island of Guidecca, which means you have to take a water bus (vaporetto) in order to get to the main island. This proved to be a non-issue as the vaporettos are reliable and operate most hours of the day. I personally loved staying on Guidecca as it was nice to escape the crowds of the main island, which can be downright overwhelming and suffocating. Taking a ride on the vaporetto also proved to be a great way to tour the city. The view of Venice from Guidecca is nothing short of spectacular. You won't regret booking Alessandro's place. That's for certain.