First of all, anyone who tells you this place is within walking distance of the sights is either a liar or a pro athlete. If walking 15 minutes or more is normal for you, yes, it's within walking distance. Otherwise, no.
The staff was pleasant and helpful. The hotel was clean. Breakfast was okay. Let's be honest; Europe is not where you go for breakfast. America owns breakfast.
Our room was very quiet. It was also small. Just room for a bed, a desk, and a wardrobe. The shower was so small, we kept bumping into the faucet and turning it off. When you sit on the toilet, your leg touches the wall.
The building is old. They maintain it well, but it's an old Italian building. The elevator is for three people, tops.
The area is good for buying food and little things. I recommend La Cucina Nazionale, two blocks away.
If you're staying for more than a couple of days, you might want to get a bigger room farther from the old part of town. You're going to be taking cabs anyway, so the location isn't that important. For a couple of days at a modest price, the Hotel Miami is perfect.