Again, this software is for Tiers, its not for humans, its for Google.
The software offer 3 levels of Spinning:
1.- Just spinning phrases. Its less unique but its better for human readers.
2.- Additionally to phrase spinning, it adds synonymous. Its really good for unique content, but its more difficult for human reading.
3.- Its spins only synonymous, making it difficult to read and a good level of uniqueness
Do not expect fully human-readable content or content that does not have grammatical errors. Its automated content, its not for humans is for Google.
At level one spinning, you will have far fewer errors and be much more readable, at level two and level three will be less readable and sometimes synonyms can make some sentences erratic.
Remember that the software has the intention to create content that Google, mathematically, consider relevant, because this content have content that is semantically strong related to the main keyword.
This program has a vision and target more mathematical than linguistic.
People often speaks about quality content, but that is at the level of the money site, this software is not for creating money sites but tiers that are classified as relevant by Google and that could link to your site passing juice, helping the money site to have a better place in search engine results.