I received an article as review copy, here's my review:
The quality is very good, I dunno if it is the best quality level, but in terms of SEO keywords, placement, LSI usage, the article is very well structured and I am very well like it and have to say, it does a good job.
You can find many good writers, but normally, they don't know SEO, so this is a mega bonus - SEO structured article.
Btw, My article is in health niche (asthma), 500 words, very good, I recommend this service.