I have debated whether to give a 4 or 5 star rating, as the apartment really is lovely, and beautifully maintained. It is mostly quiet, spacious, comfortable, looks great, and looks out on a canal. Paolo was away, but arranged for a colleague to meet us, which was helpful.
But there were just a couple of things that were not 5 star. The wifi was terrible. Not just patchy, but really bad. Also the description of the flat included breakfast, and although some apples & sweet cakes were provided I'm not sure whether they were supposed to be breakfast, and I sent a couple of messages to Paolo to clarify this, but he was away and didn't reply. I had chosen this apartment over another because of breakfast, so was a bit disappointed by this.
The €50 cleaning fee should be included in the advertised price & not a separate cash payment.
Having said all of that, we did really enjoy the apartment.
Also as a point not directly related to this apartment.. just to warn future travellers, there is an option to leave luggage at an office nearby, (e.g. If your flight is later in the day, or if you arrive earlier than checkin time), but it is a paid service of something like €5 per bag. It's worth factoring this into your travel planning.