I like that this software has so many options for encryption keys! The interface could be more intuitive but it's still very good overall with its security features as well being able of handling large amounts or data quickly without any lag time at all (speed).
We are using bluefiles because we need an end-toend solution where our clients can encrypt/decrypt documents before sending them through email which also makes sure they will not get corrupted when opened by other people who do NOT have proper credentials etc..