The cons first: Families - please note that this apartment does NOT have a washer. Don't know how much it matters to others - but it was a critical cog in the logistics for my multi-city trip & messed my schedule a bit (with the fact that laundromats are closed on Sunday in Rome) needing me to dedicate an entire morning (& 25 euros short for laundromat & taxi 2 ways) to get my clothes cleaned.
Another note-there is a small charge for towels not advertised.
The pros: Willy is a super nice guy. He even came and picked us up at the termini from the taxi line when he found out taxis were on strike. This apartment is where you want to stay location wise. It's just that the incorrect info in the posting can have jarring consequences for someone that operates like me.