It's a quite and trendy place. The building is amazing and the lift looks like an antiques and it still working.
The B&B is neat to Trevi Fountain, Vatican, St Angel Castel (it is a plus if your are going to or coming from the airport) the metro.
Breakfast it's simple but it will save you about 15euros
Paolo left me some recommendation to taste the local cousin, he is a really a nice host