The quality of the articles is pathetic. Forget native English it lacks the essence of basic English!
If the OP deals with you in private messages, the written communications itself speaks a lot about the quality of English!
1. I had referred my client to him, the quality of the articles was terrible. They had placed order for 4 articles, when they asked for quality issue, they were directed to place an additional order rather than reworking. When I intervened the OP obliged. ( screenshots and logs available from all sources, will paste if the OP contradicts or raises concern)
2. The revised articles came after a lot of delay and follow-ups and still no update.
Also seller bluntly refused to refund. Maybe that is how his business model works.
Moral : Lost relationships, money and credibility after referring him.
Be careful, do not place bulk orders. If you really want to try him pay for each article, check and proceed cautiously. And do not expect high quality delivery.