This really is a wonderful place! It's in a less touristy area of Venice away from the crowds, while still very near everything you might want to see and accessible to the train station and Piazzale Roma. It's very close to the Basilica dei Frari, but on a quiet courtyard. The windows open right onto a small canal, which we found delightful as this was our first trip to Venice. You could watch the boats and gondoliers go by during the day, but it was very quiet at night. The grocery store is just a few steps from your door, which was absolutely great.
The apartment has everything you need to be comfortable. The beds are comfy, the furniture is all very nice, and the kitchen is small but well equipped (note there is no oven or toaster, just an electric cooktop). Marzia has added lots of nice touches to make things comfortable, like extra blankets and pillows, extra towels, and lots of places in the bathroom to store your things. Plus, the shower is quite spacious by European standards!
One thing to note is that the internet is not unlimited, so don't stream Netflix in your downtime if you need the internet for other things before the end of your stay.
Marzia was very responsive and helpful in our communications, and Tina was very nice when she got us checked in. All in all, it was a great experience!