Any real Mumara users? Looking for legit reviews.

I'm looking for real users of the Mumara EMA. Namely, they have some of their files encoded and I'm worried about backdoors in place to potentially copy/steal my data.

So... am I being paranoid?

note: I haven't jumped the gun and gotten it because I saw they offer a PMTA addon and it's not above board. This has me concerned that there may be something nefarious packed in their coding.