Great experience start to finish. Location is absolutely perfect as being close to San Marco gives you an advantage to where you can hit the major attractions quickly, early in the morning before the overwhelming crowds.
The place is perfectly equipped and had everything we needed for myself, my wife and our two kids (13 and 10). The apartment was very quiet, so we slept well. We really enjoyed the kitchen in the apartment and wound up buying groceries (7 minutes away) and preparing 50% of our meals, which was a huge cost savings (as well as being fun to have access to great Italian ingredients).