Give you an idea of what mark you're likely to get, I wondering about its accuracy if anyone had used it. But on the other hand, your professor or teacher will mark the essay for free and I can guarantee that out of 10 different professors there may be 5 different grades. It's all up to the teacher and material you used; these external "teachers" don't usually have an idea what kind of resources or class materials have been evaluated and which were obligatory or supplemental.
