For starters - I'd say that there were definitely 2 major shortcomings in Sound Of My Voice (SOMV, for sort) that prevented me from giving it more than a 5-star rating.
(1) On a scale of 1-5, Maggie (though very attractive) only scored a disappointing 2, in my books, when it came to the overall magnetism of her charisma. This ripe, young woman clearly lacked the essential character dynamics to convince me (like she was trying to convince her faithful followers in the story) that she actually came even close to coming from the year 2054.
(2) Regardless of SOMV having only a nothing-budget of just $135,000, this didn't, in any way, excuse the sometimes painfully dry quality of its storytelling.
But, of course, with that said - I am not at all disappointed that I stuck with this bizarre, little film to the very end. 'Cause (in spite of its flaws and its questions left unanswered) at the point when Peter finally met privately with Maggie, that's when the intriguing twist in the story began to take on some real shape and turn into something worth paying attention to.