Very clean UI. But how can one judge the OCR quality of this service? The service presents me a converted PDF, but how good was the conversion? Is this better

Very clean UI. But how can one judge the OCR quality of this service? The service presents me a converted PDF, but how good was the conversion? Is this better than https://ocr.space https://ocr.space ? For my private documents I would always use offline OCR software like http://blog.a9t9.com/p/free-ocr-software.html http://blog.a9t9.com/p/free-ocr-software.html