We thought this apartment was perfectly located - walking distance to most sights, literally a few minutes walk to the top of the biggest shopping street (Via Del Corso), which leads to the Pantheon and the Colosseum. Also only a few minutes walk to the metro which was handy. We had our nine month old with us and the size of this apartment was great for us. Our stroller fit in the lift which was a bonus after coming from Paris where it did not! The apartment itself is comfortable with three bedrooms and three bathrooms; the kitchen is small by our standards but was pretty well stocked and suited our needs just fine. There was no microwave which isn't an essential but I suppose some might consider it to be.
Our hosts were very kind and accommodating, arranging our airport transfers for us, giving us restaurant recommendations and responding to us very quickly. We enjoyed our stay and couldn't have asked for a better location or host.