Our stay at 100 Trevi Piazza was pretty great - the location can't be beat, unless you're trying to find some peace & quiet. The Trevi Fountain is not that place! The flat itself was spacious and our kids loved having their own rooms and privacy. However, it is an old building in the middle of Rome, so there were a number of issues - none that ruined our trip, but were noticeable - spotty WiFi which we had to address by threatening to ask for money back unless it was fixed, a horrible lock on the front door (of the building, not the apartment) which took us time and frustration each time we wanted to enter, very few right angles in the flat since everything had settled long ago, showers smaller than phone booths (it is Italy, after all). It wasn't pristine, but it was culturally appropriate!