The rewritten text (I tested in German) is very good. It's very different from the original, while not changing the meaning (other tools totally mess up on this).
But the output has two problems:
1) It seems that correct capitalization is ignored about 90% of the time. So I copied the generated text to a different chat tool for correction and was shocked to discover that capitalization is actually correct. The word and phrases are only displayed wrongly (capitalization of words hidden) in the output window of Rewording, when they are highlighted in pink.
2) On these highlighted words or phrases it displays some information, when you click on them (seems to show the related original content in about 50% of the times, in other cases totally unrelated words, from my impression).
I was about to refund, when I found out that if you copy out the content of it is actually mostly correct. So I will keep it.
What worries me a bit is that the problem - not my solution - has already been visible (I don't remember if explicitly mentioned) for about 5 weeks (see in the YouTube video and review by Marcellus, see his comment below), but not fixed. This causes so much confusion and probably lost sales, I can't grasp how this has not been fixed within a few days?!
I did not check the Plagirizim checker. I would rely on other more established tools if I needed this.
Summarizer works ok, without these problems, but changed the legal form of a company, when I tired it. So read over the results carefully, as you always should with AI-generated content.