The performance is 2x faster than user-space NTFS-3G driver, as he says.
The author himself has stated that this is based on libntfs-3g (which is licensed under GPL2+)
Unfortunately, because of his selfishness and arrogance, the source code is unavailable. After some debate about the license and the obligation to provide the code, he seemed to get annoyed, and then removed the driver binaries.
The binaries are uploaded to my GitHub fork, kernel 4.14 required.
To use it, simply upload
/lib/modules/<kernel version>/ and
insmod qntfs. For autoload, run
echo qntfs > /etc/modules-boot.d/30-fs-qntfs