Very buggy. The auto crop when scanning sometimes manages to tangle to move dots on top of each other, it also even blocked out part of my page bc it didn't recognize it as part of the text! (This was a screenshot of a PDF from my gallery, so lighting wasn't an issue). Tried the free trial of the premium version, and the app kept swapping voices due to some kind of network error. My WiFi speed it 300 mbits/second upload/download and can handle multiple HD video streams, so it was their side.