This has been my experience too. Furthermore, I do not recommend Spinrewriter because I found a major flaw. The save feature does not work so that you can finish editing your article at a later time if you choose to. So if you don’t finish spinning your article like you want it all in just one sitting, then you’re screwed because when you come back more than likely your work won’t be saved where you left off, so you then have to edit and tweak manually. This is what I’ve experienced time & time again with this flawed software. I contacted spinwriter support about this and they didn’t deny the problem or even offer to fix it. This is poor support and obvious that key features such as this do not work as advertised or as presented. Therefore, I DO NOT recommend Spinrewriter.
The content above is 98% unique according to Spin Rewriter and I really like it. It actually seems better than the WordAI spin – only the “Standard” one however, it is no match for the “Turing”. One thing that the spinner failed to recognize is the “green eyes” phrase where it replaced it with “environment-friendly”. Yea, I laughed too. Anyway, here is the spintax for those interested in more testing:
I personally love this one. It creates amazing content and is extremely affordable. We use a combination of WordAI and Spin Rewriter for our SEO projects, because these two are just an amazing combination. I think Spin Rewriter beats the “Standard Spinner” of WordAI in terms of quality and human readability, but loses to its “Turing Spinner”. So what we do is use the “Turing Spinner” for Tier 1 projects and then Spin Rewriter for the lower tiers. Sometimes we might switch them up, but it really depends a lot on the situation.
When looking for a spinner that I could use for tier 1 links I tried out almost everything on the market. The ones that turned out the best were Spin Rewriter and WordAi Turing. This article isn’t a head to head comparison against the two so I won’t go into detail about WordAi but my reason for choosing Spin Rewriter was that the quality is exactly the same and Spin Rewriter costs over $200 less per year.
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.
Yea mate, WordAI really is overpriced IMO too, which is why I didn’t rank it higher in the cost-effectiveness rankings. Now, it did change more than a few words, but I see how you would think it’s less than 80% unique. TBS is also great, but only in terms of functionality and the easy interface which allows manual spinning to be done quite fast. As for their thesaurus, I think they have a lot to improve.
Honestly, we could give you many reasons. But let’s just say that it is simply the best article spinner. Once, you will use it you can see it yourself. Our instant article spinner is all that you are looking for. You can easily use this paraphrasing tool as it is very simple. It is equally helpful for writer, students and bloggers. Threes words can describe it: Easy, Fast and Reliable!
When there are so many article rewriter or article spinner tools available both online and offline then why should you use our tool? Don’t get us wrong, we are not just bragging when we say that this is one of the best rewriting tool or text spinner tools out there. We are offering you the best article spinner and what makes our article rewriter unique and distinct is its convenience and user-friendly interface. It is a simple yet an efficient article spinner that doesn’t require any sign up, registration fee or installation. All you need is a good internet connection and you are good to go. Also, our paraphrasing tool is absolutely free which makes it an ideal option for students and people who can’t afford paying heavily to writers or rewriting tool or website.  
Spin Rewriter 5.0 technology was a previous edition that allowed their clients to use the basic article rewriting system.  Their newer versions over the years have just kept getting better and better.   The new Spin Rewriter 9.0 technology gives you the option of assigning variables to your content.  Their software is dead easy to use.  In just three steps you can have up to 50 uniquely spun articles.
There are a wide range of applications that might benefit from the content rewriting capabilities of ArticleRewriterTool. The obvious applications include building content for your website or blog. Other applications include any kind of essay or creative writing (virtual or not), twitter, newsfeeds, Craigslist posts or even paid article writing services.

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Rewriting your article by hand is the classic approach that is slowly dissolving, however, many people still prefer so. Write manually and then rephrasing to ensure the finest quality is the safest way but it can often hours, days or weeks to finish a writing task that can otherwise take only a little time. And that’s why there also exist people who like to save the trouble and their time, so they look for an article rewriter or article spinner to do the job.

Yea mate, WordAI really is overpriced IMO too, which is why I didn’t rank it higher in the cost-effectiveness rankings. Now, it did change more than a few words, but I see how you would think it’s less than 80% unique. TBS is also great, but only in terms of functionality and the easy interface which allows manual spinning to be done quite fast. As for their thesaurus, I think they have a lot to improve.
Because it is the best article spinner, simple! Once you start using our instant article spinner you know what we are talking about. You have to use our paraphrasing tool yourself to know how easy it is to use. Our article rewriter tool is equally useful for bloggers, writers and teachers. It is reliable, easy and quick! Did we mention that this paraphrasing tool is absolutely free to use?