My stay at Carlos place was okay. My main issue was the wifi which really did not work at all. There is no point even advertising it. I was there for a month so the wifi was essential for me and it was not provided which was disappointing. Brought this up with Carlo but did not do anything to fix the wifi despite several complaints and just said that's the way the wifi is. I couldn't even load a page or send an email and as I was there on work this was hugely inconvenient. In the end I just bought a mobile wifi at my own expense of 90 euro. Secondly the washing machine didn't work, so I had to go somewhere else to do my laundry which was again inconvenient.
But didn't bother telling Carlo as there was no assistance with the wifi. The shower is extremely small, even by Italian standards. As other reviewers have commented these were the three main pain points. In addition, although it says equipped kitchen, there wasn't even knives or a kettle but Carlo did provide these on request.
If you plan to cook take everything from salt to oil to everything as it won't be provided. The place is walking distance to piazza maggiore and Carlo let me check out late which were plus points.