I have a pair of Schwalbe Marathon Plus that are slow, noisy, harsh, and murderous to install. And that's their good qualities....
....however, these things are indestructable. I've pulled bits of wire and glass out of them that would have destroyed other tires.
It just depends what you need them to do. If I go cross country or on an unsupported century, they are the tires I would use.
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Momento mori, amor fati.