5 stars throughout.
the next bonus is how close it is to Saint Peter Square and the Vatican museums. it really is all walkable. the area is also very nice and quiet compared to the colloseum area.
getting to the colloseum is also very easy. there are also bus stops all over that can get you to colosseum.
the Cavallegri / San Pietro bus stop is nearby a Tobacco Stop which sells Bus tickets. 1.50each, which lasts for 100 minutes, so I suggest you get plenty. (I got 25$ worth for the 3 of us, it lasted 4 nights)
Bus 46 and 916 will take you to a great spot called Piazza Venezia. 13 beautiful minutes walk to the Colosseum.