There is also the option to spin capitalized words (assumed to be proper nouns) as well as leave any number of words unchanged, depending on whatever you enter into the "ignore" field, separated by commas. You also have the option to only keep the sentences that were altered a minimum percentage, as indicated by the "Keep Sentences that Changed" option.
This is definitely one of the better options among the spinners that we have available right now, with great customer support – which I had a pleasure of dealing with, they were helpful and fast to respond. Actually the whole team behind this product is very professional, I know a couple of them and dealt with them in the past, they an alright bunch.
As you can see, WordAI is a lot more loose with the meaning of the text and uses synonyms wherever it can in order to produce the most unique content possible – this one is calculated at 98% uniqueness. Again, the purpose of such content should be for the lower tiers where you would need a higher quantity of links with not that high quality content.

Finest spinner in the market today and more for me because saves a lot of my time... Earlier i have used the best spinner but this spinner is 10 times better faster, easy to use, and articles make more sense, unique, also helps in preparing new articles and spins same article into hundred of more articles for back-linking, etc. 2 thumbs-up... simple and easy to use...

It's a long, long job to research your keywords, keyword phrases, LSi's etc and then to write content for your chosen search term that has the perfect keywords, and the perfect density of those keywords. This plugin looks at the top 10 Google SERPS for your search term, compares them to each other, and then tells you the keywords that ALL the top 10 pages are using in their content, PLUS the density of those keywords. In less than a minute you will know EXACTLY which keywords and their relevant density to include in your website copy so that it matches Google's exact keyword expectations. Click here for more details.
Readable And Unique Content – the recommended settings for this one are the same as for the one above with the only difference being the change of the 1st input to “Readable”. This will create more unique versions of your content while still keeping a high level of readability. Generally, this is the best setting as it gets a good balance between human readability and uniqueness of the content generated.