Funny. They are terrible on Danish and Norwegian layouts. Like, the pipe is command+i and I always have to look up square and squiggly parens. I think they are on top of normal parens .. or next to. But they are not indicated on the keyboard and they take a modifier, but if you use the wrong modifier, you'll change tab in your browser window. ~ is also not printed on the keyboard and takes a modifier, causing a clash with the command-~ shortcut for changing between windows in the same application.

I am utterly unimpressed and I want to sell my laptop just to buy a new one with US layout.