This place was perfect for me and my wife during our stay in Rome. 5-25 minutes walking distance to Vatican, Pantheon, Trevi Fountain, Steps & Colosseum. It's tucked away near the river so you're not in the middle of the tourist madness but close enough for when you want to check it out. Apartment is right on the first floor - so easy if you have many bags.
The apartment does have low ceilings, so if you're 6' or taller, something to consider.
Alberto also sent us a message prior to our arrival with great restaurant, bar and gelato recommendations (some right down the same street). He was very responsive if we had questions and also arranged for airport transfer the morning we left - so seamless and convenient.
Would stay again without thinking twice or looking elsewhere.