The appartment is very well located, one minute away from St Marco place. It's air conditionned, which is very necessary in August. The terrace is very nice for breakfast or evening. The arrival to the appartment was spotless and Brigitte very helpful.
However I would not recommend sleeping there. Both sofa beds are a nightmare. I know sofa beds are not supposed to be as confortable as regular beds, but those are litteraly the worst sofa beds I slept on ever, and I've slept on more sofa beds that I can recall. The one in the kitchen might be acceptable (still bad though) if you sleep alone, but for 2 regular size adults it is not. For the other one, your head will be 5cm below the rest of your body on pillows, as the mattress (very bad too) is actually a square of 140x140.
I understand the logistics of changing a bed/sofa bed might be complex in Venice, but if you decide to rent an appartment, the bed is the most important part, especially after a day walking around Venice.