Domus Caracalla is a pretty good budget hotel. As previous reviews mention, it's a good 10mins walk uphill from the Colosseum. I would google map the street and also review some of the exterior images (this will make it easier to find). We found the breakfast to be ideal. A great start to the day. We were disappointed with our room (Room 4), I believe it's the only one without a balcony, and since we were staying for 5 x nights (during my birthday), we were gutted not to eat breakfast out there. The two ladies on Reception seemed smiley and very nice, however it was difficult to get information regarding getting to the airport (Ciampino) from them (non committal and trying to sell taxis for 50 euro). To anyone travelling to and from this airport, we recommend the Terravision buses - they are only 6 euro one way, but word of caution: remember to buy the bus ticket in a Terravision café in Termini - you won't get on the bus without a pre-bought ticket.