I would recommend staying here if you are on a tight budget like we were. It is a 20 minute walk from the Colosseum as advised and this is possibly the first major sight you will come across when visiting the city by foot. 20 mins isnt a far walk but I would suggest taking a little extra money to be able to get taxis when you are tired as a 20 min walk is a fair task with sore feet in 30° heat.
The apartment is very clean, the rooms are spacious. There is no air con however as the apartment is on a lower floor it is well shaded and so the room temp is bare able. I was really happy with the stay as was my travel companion and Rome is the most beautiful city.