[FrAnKs]

Can be both, depending of the context.

You could say : C'est l'enfer comment cette ville est belle ! ( It's incredible how beautifull is that city ) ... aswell as : C'est l'enfer comme il faut chaud aujourd'hui ( it's incredible how hot it is today )
(I used the word incredible here, but it could be another one )

I was confused in english about the expression ''Screwed up''. I first thought it was something good ! ... But a friend told me that it is not ! ... I was surprised. Then I know now, that I could say : I screwed up my exam , wich is supposed to mean that I failed ! lol very odd.