Is 22 euro an hour good or mediocre?

That would be shit-ton of money here.

Depends on where you live, I suppose.

Depends on whether you're serving fast food or performing heart surgery. Which, now that I think about it, are not unrelated actions.

That's bout 42k a year. Good, not great better than unskilled work in Germany.

As an American of course I am not up to date on euros. How many to one dollar?