30 mins walk from Tiburtina bus station and 30 mins walk to the colloseum, which is the nearest major landmark. The nearest metro station was about 15 mins walk, which gets you to the Vatican City etc., and the bus 71 is only a 5 min walk away.
We had a great stay with Gabriele - he is easy to talk to, very attentive (the best air bnb host we've had) and gave us some great recommendations for pizza and ice cream in the surrounding neighbourhood. Breakfast was a plus every morning. Lucifer the cat is also adorable.