If I could just say in a few word what i feel about this hotel would be : DON'T GO THERE!
Let me explain, the service is awful. The first interaction with the receptionist wasn't really pleasant. We did the checkin early in the morning (9.30) and we planned to check out very early as well (6 am). So we asked her gently if we could have breakfast the day of the checkin instead of the day of the checkout. She said no without any reasons. I mean I would have changed anything for the hotel and We would have been happy customers. But then it started worst and worst. We didn't have any hot water. we complained about it, she said (again the same women) that we weren't the only ones complaining and she talked about it to the owner. The next morning, still any hot water and the day after neither! In other words, we didn't get any hot water in the morning for 3 days, the whole stay!!! Then finally to top everything, we didn't get any wifi neither!
In conclusion, the service hotel is awful, nothing is there to please the customers. The only advantage of this hotel is the location but I guess in Venice, there are plenty of others hotels which are well situated as well with hot water!!!