Alessia is awesome! Basically, she is like having Google for Rome. Need to know the best Gelato? She's got you. Need to know the closest place to buy bus tickets? She's got you.
We were in Rome for 4 days and only spent 18 euros on getting around the whole trip. The bus is right down the hill from her place and it can get you every where.
As for her place its spacious, clean, cool, and safe.