The flat is really quite unique, with 5 meter ceiling, huge windows, antique furniture. Perfect location.
Clean and has all you need.
Cristiana is a great host (although I'd challenge her choice of restaurants))
Some minor con's
The bed could be more comfortable - but not critical
The air conditioner is located inside the flat (think it's normal for Venice because you can't place an a/c on a historic building but I've never seen this before) and is working quite loud - be sure to carry your earplugs if you're sensitive to noise when sleeping
the balcony is splendid but the view could be better as it's actually facing a wall