Originally Posted by Purple Sage
But if your outside door mat is exposed to the elements, then having a 'waterhog' outside would just get soaked in the rain. It would make more sense to have it inside where wet shoes are stepping in.
Exactly. A waterhog should be inside.
But if the OP has a covered front porch, it can go there. And I wouldn't put it at a formal entrance on the hardwood (though I might put a nicer looking waterhog one there. I think LLBean has some better looking versions).
Ideally, one should have a sisally type outdoor one for wiping off mud and an interior one to dry off wet shoes.