I would say it´s easier for me, if someone takes an eye of my work. They see, what I don´t see, and mostly it´s when you´re stuck or you don´t know anything to do with these character.
It´s like opening a second door to your book.
Sometimes, it´s hard for my crit partners because I re-write my story often. And they have to do their hard work again. And again. And again, maybe.
And like I said so many time before: I NEED BUTT-KICKING! 😀