This means I can mostly trace the votes that I observed being cast at my local polling station, that I participated in counting ('rougly'), and I can verify there are no serious differences to the 'detailed' count and they are accounted for in the national result.
Will there be differences? Sure, there's a lot of manual work. But you can likely observe that those differences are small and noisy enough that they won't affect the final result of the election.
Is this perfect? No, it's still a bit too hard to actually perform those checks. Also I don't completely understand the process of voter registration, and there's the mail-in votes (for disabled voters and votes living abroad).
But all in all, I think we're doing pretty good.
Now let's hope the politicians honor the trust we put in them by voting for them!