APARTMENT IS TOO SMALL FOR 4 PEOPLE
It is a tiny, cramped space where only 1 person can be in the kitchenette at a time and only 2 people can sit in the living room as the sofa seats only 2 people and it is the only piece of furniture in that space.
There is nowhere to eat: there is one long table with stools but the table surface is covered in decorations.
WiFi SLOW AND UNRELIABLE
The WiFi was incredibly slow and worked for the first few hours after our arrival - perhaps from 4pm until 9pm. Thereafter it was down and remained so for the duration of our stay.
Without WiFi we did not have access to maps and wasted a whole morning trying to find SIM cards. (The SIMs then took hours to activate so we were still no better off!)

Raising the WiFi issue with the host proved to be unhelpful as she was dismissive and replied with "what's the problem?" "Life happens" "I see you weren't able to find WiFi outside the building" (which was correct, as in Italy, codes are sent to your telephone number to activate WiFi and I didn't have one at the time).
She did not apologise for the inconvenience this had caused my family and in the process of my attempt to communicate the problem clearly she became increasingly defensive and said "I see you are just angry".
It was a most bizarre interaction which I hope has arisen from a language barrier, but I still can't find any excuse for an amenity being advertised and then not provided. A portable WiFi router should be supplied for instances where the wireless network fails or WiFi removed from the description entirely.
POOR VALUE:
Too expensive for the size.
Apartment described as 'luxurious' but there are a lot of plastic plants and almost no natural light. Glasses in the kitchen cupboard were sticky, artificial grass in the bathroom had a foul smell coming off it, and the bedding on the bed I slept on was a stained duvet that had been sandwiched between two white sheets. The numerous white pebbles which cover much of the floor surface area, have dust visibly trapped between them.
You are required to wash the dishes at check-out which I would do anyway, but there is nonetheless a cleaning fee.
WHO THIS APARTMENT MIGHT BE SUITABLE FOR:
This apartment would suit 2 friends travelling together who each want their own bedroom, and who don't intend to cook or spend much time indoors.