I don't know about Paragon's NTFS driver for Linux, but their non-free Ext4 driver for Windows had a nasty bug until recently, where it would change file ownership and permissions in the filesystem mounted in read-only mode, rendering the driver unusable. The bug apparently got fixed after numerous complaints on their support forum, but I still use this driver very cautiously and only when I have to.

So I wouldn't trust Paragon's claim of "decades of expertise in commercial file systems development and huge test coverage."