Articoolo is a rapid content creator that produces a highly readable draft document from a seed keyword on the topic of your choice, then produces an article up to 500 words within minutes.
Unlike some instant article builders that scrape and mash together snippets and sentences from multiple articles, Articoolo sources a single document and rewrites it to high uniqueness. As such you generally end up with an article with the same logical flow from beginning to end.
Other mash-up style rapid article generators tend to write both paragraphs and articles that lack any cohesive topical flow. They may have well written sentences, but aren't in ANY logical sequence or order.
I consider Articoolo to be a great way to quickly build a DRAFT article. But it won't be perfect. A basic proofread and some quick edits are needed to smooth out any rough word substitutions and to tailor the article to your specific intent.