This hostel is very good and it is not too far from metro. I would recommend you to stay here.
There is no negative side for this hostel. Everything is very nice and it is not too far from train station.
This is the best place to stay in Roma!
I thought the toilets should cleaned all the time. I understood that they are shared and difficult to keep them cleaned properly. However, please do it, It is only thing what I'd like to recommend