Schufa is a pain in the ass. But almost every company used it's scoring points (Landlords, Banking, Phone companies etc) for judgement of financial security of the customer.
The German court allready decided a case against Schufa, which entitles a lot of people to financial compensation (e.g. Phone providers, who provided data to Schufa without acknowledging of customers).
It looks like Schufa might be done and this one will be the last nail into the coffin.
I made a reminder to do a yearly inquiry there for providing me with my data, the same data would cost around 30,-€ but once a year we can check the data about us there (Data Security and Privacy Act)