REVIEW:
OP was kind enough to provide me a review copy.
After giving him the details, I got the article in my inbox within two days which is more than satisfying turnaround time.
The article itself was 609 words long (Considering the review copy was for a 500 word article, I'd call that a nice over-delivery.), 100% passed copyscape and had 0 grammatical errors. It also had multiple paragraphs, couple of bullet points and all in all made complete sense.
As far as usability, I wouldn't use this for my money site if I was planning on branding it but I'd be more than happy to use it for some high quality web 2.0s or as an article on an article on a churn and burn site.
That being said, the articles I'd feel comfortable using on a really important brandable site are more in the range of $20+ / 500 words so I wasn't even expecting that. Hell, most $5 articles I bought were barely Tier 1 content, had loads of grammatical errors and provide absolutely no value to the reader.
All in all, if you need a source of cheap content which can be used without the need to go over it manually, then this is the service for you.