I do recommend Luca's B&B as I really enjoyed staying there. Great location close to Termini station, tram stop. You can reach Colosseum and other places of tourist attraction walking on foot.
As I stayed in B&B 2 times, 4 days in total, I was accommodated in 2 different rooms. But both of them were spacious, comfortable and clean. Beds were comfortable too.
For breakfast you can have biscotti, yogurt, cereals, tea, coffee.
Luca is a wonderful host, very helpful and attentive.
I felt myself here like at my friend's home! Thank you, Luca!!