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They are a highly versatile band who has a lot of timeless songs, so they're underrated to me.
Their music is considerably more intelligent than people give them credit for. Well crafted, sometimes challenging, always big and hooky. Some big, big songs. Definitely under-rated.
They have alot of popularity, but critics usually hate them. So I'm going to say they are underrated by critics.
Amazing virtuoso, versitile band with an amazing range.