You can request a free “data copy in accordance with Art. 15 GDPR”, which according to them “contains information that you should treat sensitively.” and further: “SCHUFA therefore advises against passing it on to third parties.”

The product they market, the “credit report”, costs €30 and, according to them, is “forgery-proof” and “up to date” (lolz).

I don't know the main differences to the free "data copy" - probably just a report with this specially invented key figure and a bit nicely prepared.

All in all, SCHUFA has a very unsympathetic image here in Germany, I think rightfully so. Nobody wants to have anything to do with them voluntarily.