Flex on FX505 keyboard?

[jkang5]

I heard it was bad, but now that I've got one myself it's honestly quite ridiculous- just lightly pressing on a key near the center of the keyboard will make it bend. Have any of your keyboards become partially/completely unusable due to this flex? I wouldn't mind it as much if I wasn't so worried that someday the flexing will cause some sort of internal damage.