I’m not sure about the best sites as I’ve only been scammed by research paper writing services so far. AVOID bestcustomwriting.com at all costs, they completely failed my research paper.
The customer support team convinced me that my paper would be written by an expert in the field (I study economics), but the writer turned out to be utterly clueless about the topic. His knowledge on the topic of my research paper was even worse than mine and I paid $350 FOR NOTHING. I received a nonsensical paper, missed my deadline, and wasted my money.
Now they refuse to give me a refund, claiming that the writer followed my instructions and that the paper is plagiarism-free. Since bestcustomwriting.com seems somewhat popular I thought I'd share my experience in case you're considering them for your research papers. PLEASE STAY AWAY. I've tried two different research paper writing services at this point and it seems like there legitimate research paper writing sites simply don't exist.