Palazzo zen is in the perfect location to explore Venice. It's off the beaten track so quite peaceful but close enough to walk to all the major sites. There are plenty of restaurants and bars close by if you don't want to go far- Ogios in campo Gesuiti is highly recommended. It's also very handy for the alilaguna stop at fondemente nuove.
The apartment itself is unique. It is in a building that it being restored so you get a glimpse of its former glory. You could believe you had wandered into a stately home or museum, complete with ornate furniture and frescos on the wall. The downside is that lots of the furniture is useable or just uncomfortable-a couple of comfy sofas would be welcome, as would the addition of wifi. However it's amply equipped to meet your basic needs.
The main bedroom is magnificent with view over the canal where you can spend a lot of time gazing at the tranquil view. The other bedrooms are a bit Spartan and lack privacy as they lead off the main corridor to the master. It's fine for families but maybe not groups.
Pietro the owner was very accommodating and v helpful in allowing our daughter an early check in. Communication can be difficult as he does not speak English. We got by in French but information is not as forthcoming as with other air bnbs.
Overall Palazzo Zen provided a highly memorable experience which I would hope to repeat.