I just have to point out that the discusssion points presented by forumregulator actually make sense and should be taken into consideration by students looking to hire a writer directly or is in the process of vetting a company writer.
Undergrad papers are much easier if you are writing within an area you've studied because you can simply regurgitate what you already know.
Consider if you will that you will not have a car mechanic perform a surgery, even if he claims that he has the practical experience to perform an appendectomy, you would not hire a Biology graduate to write a paper on British History. He knows about biology and its related fields, but most certainly not British History.
As for Postgrad, you'll need to do more research because most of them demand use of theories and concepts that you first need to have already mastered before doing your research.
This is the reason it is quite difficult to write a postgrad paper in an area you are not familiar with.
I cannot believe that there was actually someone who was at this forum before @a1writer recently arrived and began saying the very same things. I am now more convinced than ever that a jack of all trades writer cannot writer papers higher than his actual educational level and also, within the actual realm of study he matriculated in. If you have not studied all of the available college and post grad courses, it would be improbable for a multi subject writer to deliver an A+ paper every single time, regardless of topic. Specially in the masters and Phd levels.
The opinions are that of the author's alone based on an individual capacity. Opinions are provided "as is" and are not error-free.