Great location and super nice hosts. It's a bnb where you get your own bathroom and coupons for an Italian breakfast at a small cafe around the corner.
The interior is clean and bathroom looks super tidy. The shower is a bit small, i would avoid if you are larger as there isn't much room to move around. It's a little drafty but had a heater you can at your leisure.
The walls are a bit thin so if you are an early sleeper or late riser you can hear your neighbors next door or in the living room. Also, you can hear the street below. While there aren't any lively places directly outside, there are a bunch of restaurants and bars around the corner. The trash truck comes around at 630 so you will hear all the bottles being dumped.
The location is perfect. It's a 5-10 minute walk to the Colosseum and there is also a subway stop near by. Cavour is only one stop from the main station at Termini