We stayed at Luca's place as a group of twelve over the weekend. Flat is very spacious and comfortably accomodates such a large group. Place was clean, beds were reasonably comfy (that includes two foldable sofas). Two small cot beds might not be the best choice for large people - but there are only two of these so it wasn't a problem for us. Two kitchens are well equipeed with hob, microwave, dishwashers and all necessary utensils, plates, cutlery etc.
There is also air con in most of the rooms, sadly on a second day of our stay air con in one of the rooms broke down and that room was getting a bit uncomfortable to sleep in. Also, during our stay internet was not available, host tried to fix it/contact the provider but without success.
Check in was easy and quick, Cristina met us on time and was very flexible with time and gave us a lot of helpful tips and advice about neighbourhood, restaurants and shops. There is also additional storage room, where we were able to leave out luggage after checking out, which was very helpful.
Place is located a short walk from alilaguna boat stop (airport transfer) - in a quiet street (not much of tourist crowd) - it was very quiet at night. Major attractions like Rialto Bridge or St. Marco are 10 - 15 min walking distance.
In general an affordable place to stay for large group, good location, friendly and communicative host, good value for money.