I stayed one night for a concert at the Olympic Stadium, the position was superb: few steps from the metro station "Cipro" and 30-40 minutes walk to the stadium avoiding all the hassle of public transportation during such events (trust me it's a hell, I'm Italian). The room was clean, I had the one with the separate bathroom but it was private and spotless as well, just not en-suite. I managed to check-in few minutes earlier thanks to en excellent communication with the host and his collaborators. Great value for a night in Rome next to a metro station.