Examples of using "Einwandfrei" in a sentence and their english translations:
He is impeccable.
This keyboard is perfect.
Your English is impeccable.
The rest is perfect.
even though my vision is perfect.
My computer works fine now.
The car is old but good.
It works perfectly. You just don't know how to use it.
The content of the contract was otherwise impeccable.
Tatoeba is back, but not everything will be working perfectly.
While this is grammatically correct, you wouldn't express it so in the real life, right?