We spent just under a week at this apartment. While it was well located and quiet, there was some significant issues both with the owner, Paola and the place itself.
Firstly, when we arrived the apartment was dirty - the bathroom floor was full of hair, the toilet had remains of excrement, the carpets looked filthy and the fridge had old crumbs and looked pretty dirty. Once we called to ask for the place to be cleaned, the owner sent someone immediately so that was corrected - however she should have checked the work that the cleaner had done, before the arrival of guests (especially as she had her assistant, Fabio in the flat waiting for us - how could he not have checked while waiting??)
Secondly, we were provided with 2 sets of keys - at checkout when we asked for the instructions Fabio told us to leave them in a certain location which we did - we unfortunately forgot that we had 2 sets not just one and left with one of them. In retrospect, Fabio should have said to leave BOTH sets as it's quite unusual to give 2 bunches of keys to guest. Nerveless, when Paula contacted us to tell us we had forgotten to leave the keys, we did everything in our power to return them to her asap.
On a 10h drive back from Italy we added one extra hour to go into a city, locate a post office, try to speak with Italian workers who didn't speak any English - only to be told that keys and metal cannot be sent in the posts. We then informed Paula of this, and said we would send them as soon as we arrived home - either by post, recorded delivery or DHL etc. When we got home, we did just that and sent Paola a picture of the recoded delivery note so she can track it.
A few days later Paola got back to us with an angry text saying she had to pay an extra 15euro to receive the parcel (and she did not receive it, so all our effort was for nothing!) and we should have paid it - we were never told from the post office that we had to pay anything extra - if we had to, we would have of course paid. She said she decided to cut new keys.
Paola did not tell us she had to pay, we would have gladly reimbursed the cost to her, but she immediately thought of the worst of us - that despite all the effort and cost we did to correct the mistake and get the keys to her as soon as possible.

Paola is not a good host at all. She doesn't communicate well and the fact that she did not collect the keys, which will now travel all the way back to us - shows her pettiness. The place was dirty, appliances, carpets, furniture were all of low quality - I would not stay here again and would not recommend this owner.