You may want to ask sq. ft of the apartment (it’s pretty small/cramped), as the pics don’t give true size of apartment as they are taken with a wide angle camera lens.
Ask for sufficient toilet papers & towels to last the number of days staying, also ask and ensure all the equipment in the apartment are working when you check in (that are advertised), washing machine was not working/broken. The owner will charge obscene amount for simple services such as opening apartment with spare key, when they don’t tell you upfront that the full apartment rented involves 2 actual apartments with different sets of keys to be managed
Also, there was an additional Eur 3.5 per day per person charge that was not communicated at time of booking, which was collected in cash and no receipt was provided either - this in particular seems shady at best; so I’d suggest future renters to be careful about all expected charges when they rent the apartment. Location is perfect though, right besides the colosseum
All in all, underwhelming experience :-(