The house Micasa corresponds 100% to the pictures. We had a very nice stay here and enjoyed Rome a lot. The owners are very friendly and were flexible on the check-in and check-out time (not always possible, but it was for us). They are also very responsive.
Comments of other people about the smell in the bathroom are correct, but if you leave the windows open it’s ok. Not too much storage for clothing (small closet with enough hangers but no shelves) and no water kettle in the kitchen (but you can use a pan).
If you need darkness to sleep, take something to cover your eyes.
Location is great for the Colosseo (walking distance and you can see it from the doorstep), but a bit further away from the other main tourist spots. Bus connections are however super close and very easy!
The airco in the living room seems to have a problem, and though they tried their best, it didn’t work during our stay. They one on the bedroom did however and cools also a bit the rest of the house.
Overall: a very nice stay in a beautiful house and very friendly hosts! We recommend!