Grad ND filters

Anyone ever used one?
I get annoyed at blown out skies ... but to me a grad ND would only seem to work when you have an empty sky? If you have a building or plants sticking up into it, it'd look all wrong ... correct?
I get annoyed at blown out skies ... but to me a grad ND would only seem to work when you have an empty sky? If you have a building or plants sticking up into it, it'd look all wrong ... correct?